Technology is persistently refreshing at such a fast speed that it shouldseem to be faster than lightweight. A technology or a programing languagecreating the rounds in the weekperhaps obsolete within the next few days. As Associate in Nursing ever increasing variety of assets arplace resources into innovative work, laptop scientists and specialistsarcontinuously tweaking and dealing on existing advances to require advantage of them. Here armost likelythe foremost recent moving advances that ensure to overwhelm the IT business within the forthcoming years.

1. Data Computing

Artificial intelligence or AI could be a technology accustomed match laptop systems with human decision-making capabilities. Being one amongst the trending technologies, once Al programs ar fed to systems, the aim is to mimic human intelligence for actingadvanced tasks, like pattern recognition, speech recognition, prognosis, and diagnosing. So, learning Al canassist you secure job roles. like machine learning engineer, informationman of science, laptop vision engineer, business intelligence developer, information analyst.

2. Information Science

Data science is that the technology that helps to create sense of advancedinformation. Everyday a lot ofinformationarmade by firms across the world. This includes Business information, Sales data, client Profile info, Server information, monetary Figures. the long run scope of information science appearance promising, successivelymaking opportunities for the subsequent career roles, informationman of science, informationdesigner, business intelligence manager, information engineer, information analyst, business analyst.

3. Internet of Things (IOT)

IoT, could be a network of devices that ar connected to everyalternative. The devices willmove and share information. These gadgets may be associated by suggests that of Wi-Fi, and that they share inforegarding their surroundingsand the waythey’re being used. The devices have a laptop chip that facilitates this exchange. it’sforeseen that quiteforty one billion devices hopped-up by IoT are going to beemployed by 2025. IoT chips embedded on machines facilitate businesses assess those machines performance and assist in their maintenance. Learning this most up-to-date technology can assist you with securing positions, as an example, IoT computer code developer, system style engineer, IoT product manager, IoT analysis developer, IoT resolutiondesigner.

4. Blockchain

Blockchain is that the foundational technology that powers electronic currencies like cryptocurrencies. In easy terms, a blockchain is Associate in Nursing electronic ledger that may be shared among totally different users. This helps in making a record of transactions that can’t be altered, creating the technology verifiable and secure. there’san increasein an exceedingly career in blockchain. Here ar some opportunities that ar on the increase. Blockchain developers, blockchain quality engineer, blockchain legal adviser or professional person, blockchain engineer.

5. Robotic method Automation (RPA)

Robotic method automation, RPA could be a technology accustomedautomatize daily tasks. Like computing, computer codeis employed here to automatize a series of tasks like handling and responding to emails, process transactions and manipulating business information. firms like Accenture, Deloitte and Capgemini use RPA tools to automatize their daily operations. Therefore, the bestwant for masterly professionals in RPA is to follow the varied RPA operating rules. RPA Developer, RPA Business Analyst, RPA adviser, RPA resolutiondesigner, RPA Project Manager.

1. Fluorescent Bulb Usage: Use compact fluorescent light weight (CFL) bulbs to measure bulb square measurement every second
   Extra energy saving and consumption but seventeen compared to regular bulbs. In
   Bulbs have a longer lifespan than ordinary bulbs.

2. Receive carpooling. If you choose less driving, the warming can also be reduced. One chooses carpooling or athletics. Each strategy can suit you. In addition to saving your fuel, it reduces the most important contributors such as fumes from oil and hydrocarbons and is a major step in reducing energy wastage.

3. Reduce, reuse, recycle: Use eco-friendly materials and look to reduce the touch of waste without buying new items. Use plastic containers, recent newspapers, bottles, cardboard boxes, food cups, bread tiles and more. By doing this you do not have to buy new items because the recent one works equally well and your costs are also reduced. One can also use non-reusable items to maintain the setting.
4. Plant trees: The green offering for planting trees would not only feed you the environment, however, will play a key role in reducing global warming.
5. Regular Car Maintenance: When a person focuses on making their vehicles work better by focusing on regular maintenance and maintenance, the car will emit less carbon dioxide. This will help to reduce global warming.

1. Bandwidth
   Investing in fiber optic net will considerably increase your information measure potential. Copper wire infrastructure and TDM technology ar restricted in nature. as a result of it had been originally designed for transmission voice calls solely, the demand for information measure wasn’t high. as an example, T-1 will solely carry one.5 Mbps of outturn. and since of however electrical signal works, many sorts of connections over cable ar restricted by distance.
   Ethernet over Copper service (EoC) is usually not obtainable if the circuit is longer than fifteen,000 feet. For organizations considering shifting their voice communications to Voice-over-IP (VoIP), having your information measure delivered over fiber is an imperative plus.
2. ) Upload and transfer speed

Is the speed increase of fiber optic net noticeable compared to cable? completely.
Many Atlantech on-line customers mistreatment fiber to attach to our network will transmit information at one gigabit per second. that is repeatedly quicker than the federal government’s definition of broadband service, that is twenty five Mbps uploads and three Mbps for downloads as of Gregorian calendar month 2019.
Tech journal NorthWest writes that downloads that take twenty two minutes over most copper wire net connections will take as very little as eight seconds over fiber.
With this technological advancement, the thought of “waiting for issues to load” is close to be a thing of the past.

3) Reliablity

There ar several factors which will cause outages once a company is dependent on copper cable-based net. Temperature fluctuations, severe climatic conditions, and wetness will all cause a loss of property. recent or worn copper cable will even gift a hearth hazard, thanks to the very fact it carries an electrical current.
Additional dependableness considerations related to cable embody risks of interference from electronic or radio signals. in addition, copper wires ar accessed within the building by utility personnel and typically they’ll build mistakes and manipulate the incorrect wires.

Overclocking is that the action of accelerating a component’s clock rate, running it at a better speed than it absolutely was designed to run. this can be typically applies to the hardware or GPU, however different parts may be overclocked.
Increasing a component’s clock rate causes it to perform additional operations per second, however it additionally produces further heat. Overclocking will facilitate squeeze additional performance out of your parts, however they’ll usually would like further cooling and care.

What Is Overclocking?

Your computer’s hardware comes from the mill set to run at a definite most speed. If you run your hardware at that speed with correct cooling, it ought to perform fine while not providing you with any issues.
However, you’re usually not restricted to it hardware speed. you’ll increase the CPU’s speed by setting a better clock rate or multiplier factor within the computer’s BIOS, forcing it to perform additional operations per second.
This can speed up your hardware and thus speed up your pc if your pc is proscribed by its hardware, however the hardware can turn out further heat. it should become physically broken if you don’t offer further cooling, or it should be unstable and cause your pc to blue-screen or restart.

Can You Overclock?
You may not even be able to overclock your hardware. several motherboards and Intel CPUs ship with barred multipliers, preventing you from tinkering with their values and overclocking your hardware. Intel sells additional CPUs with unsecured multipliers, targeted at enthusiasts that wish to overclock and squeeze equally of performance out of the hardware. (Look for CPUs with “K” in their model variety.

Human body, the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems.

Human anatomy and physiology are treated in many different articles. For detailed discussions of specific tissues, organs, and systems, see human blood; cardiovascular system; digestive system, human; endocrine system, human; renal system; skin; human muscle system; nervous system; reproductive system, human; respiration, human; sensory reception, human; skeletal system, human. For a description of how the body develops, from conception through old age, see aging; growth; prenatal development; human development.

For detailed coverage of the body’s biochemical constituents, see protein; carbohydrate; lipid; nucleic acid; vitamin; and hormone. For information on the structure and function of the cells that constitute the body, see cell.

Many entries describe the body’s major structures. For example, see abdominal cavity; adrenal gland; aorta; bone; brain; ear; eye; heart; kidney; large intestine; lung; nose; ovary; pancreas; pituitary gland; small intestine; spinal cord; spleen; stomach; testis; thymus; thyroid gland; tooth; uterus; vertebral column.

Humans are, of course, animals—more particularly, members of the order Primates in the subphylum Vertebrata of the phylum Chordata. Like all chordates, the human animal has a bilaterally symmetrical body that is characterized at some point during its development by a dorsal supporting rod (the notochord), gill slits in the region of the pharynx, and a hollow dorsal nerve cord. Of these features, the first two are present only during the embryonic stage in the human; the notochord is replaced by the vertebral column, and the pharyngeal gill slits are lost completely. The dorsal nerve cord is the spinal cord in humans; it remains throughout life.

Characteristic of the vertebrate form, the human body has an internal skeleton that includes a backbone of vertebrae. Typical of mammalian structure, the human body shows such characteristics as hair, mammary glands, and highly developed sense organs.

Beyond these similarities, however, lie some profound differences. Among the mammals, only humans have a predominantly two-legged (bipedal) posture, a fact that has greatly modified the general mammalian body plan. (Even the kangaroo, which hops on two legs when moving rapidly, walks on four legs and uses its tail as a “third leg” when standing.) Moreover, the human brain, particularly the neocortex, is far and away the most highly developed in the animal kingdom. As intelligent as are many other mammals—such as chimpanzees and dolphins—none have achieved the intellectual status of the human species.

Chemical composition of the body

Chemically, the human body consists mainly of water and of organic compounds—i.e., lipids, proteins, carbohydrates, and nucleic acids. Water is found in the extracellular fluids of the body (the blood plasma, the lymph, and the interstitial fluid) and within the cells themselves. It serves as a solvent without which the chemistry of life could not take place. The human body is about 60 percent water by weight.

Lipids—chiefly fats, phospholipids, and steroids—are major structural components of the human body. Fats provide an energy reserve for the body, and fat pads also serve as insulation and shock absorbers. Phospholipids and the steroid compound cholesterol are major components of the membrane that surrounds each cell.

Proteins also serve as a major structural component of the body. Like lipids, proteins are an important constituent of the cell membrane. In addition, such extracellular materials as hair and nails are composed of protein. So also is collagen, the fibrous, elastic material that makes up much of the body’s skin, bones, tendons, and ligaments. Proteins also perform numerous functional roles in the body. Particularly important are cellular proteins called enzymes, which catalyze the chemical reactions necessary for life.

Carbohydrates are present in the human body largely as fuels, either as simple sugars circulating through the bloodstream or as glycogen, a storage compound found in the liver and the muscles. Small amounts of carbohydrates also occur in cell membranes, but, in contrast to plants and many invertebrate animals, humans have little structural carbohydrate in their bodies.

Nucleic acids make up the genetic materials of the body. Deoxyribonucleic acid (DNA) carries the body’s hereditary master code, the instructions according to which each cell operates. It is DNA, passed from parents to offspring, that dictates the inherited characteristics of each individual human. Ribonucleic acid (RNA), of which there are several types, helps carry out the instructions encoded in the DNA.

Along with water and organic compounds, the body’s constituents include various inorganic minerals. Chief among these are calcium, phosphorus, sodium, magnesium, and iron. Calcium and phosphorus, combined as calcium-phosphate crystals, form a large part of the body’s bones. Calcium is also present as ions in the blood and interstitial fluid, as is sodium. Ions of phosphorus, potassium, and magnesium, on the other hand, are abundant within the intercellular fluid. All of these ions play vital roles in the body’s metabolic processes. Iron is present mainly as part of hemoglobin, the oxygen-carrying pigment of the red blood cells. Other mineral constituents of the body, found in minute but necessary concentrations, include cobalt, copper, iodine, manganese, and zinc.

Organization of the body

The cell is the basic living unit of the human body—indeed, of all organisms. The human body consists of trillions of cells, each capable of growth, metabolism, response to stimuli, and, with some exceptions, reproduction. Although there are some 200 different types of cells in the body, these can be grouped into four basic classes. These four basic cell types, together with their extracellular materials, form the fundamental tissues of the human body: (1) epithelial tissues, which cover the body’s surface and line the internal organs, body cavities, and passageways; (2) muscle tissues, which are capable of contraction and form the body’s musculature; (3) nerve tissues, which conduct electrical impulses and make up the nervous system; and (4) connective tissues, which are composed of widely spaced cells and large amounts of intercellular matrix and which bind together various body structures. (Bone and blood are considered specialized connective tissues, in which the intercellular matrix is, respectively, hard and liquid.)

The next level of organization in the body is that of the organ. An organ is a group of tissues that constitutes a distinct structural and functional unit. Thus, the heart is an organ composed of all four tissues, whose function is to pump blood throughout the body. Of course, the heart does not function in isolation; it is part of a system composed of blood and blood vessels as well. The highest level of body organization, then, is that of the organ system.

The body includes nine major organ systems, each composed of various organs and tissues that work together as a functional unit. The chief constituents and prime functions of each system are summarized below. (1) The integumentary system, composed of the skin and associated structures, protects the body from invasion by harmful microorganisms and chemicals; it also prevents water loss from the body. (2) The musculoskeletal system (also referred to separately as the muscle system and the skeletal system), composed of the skeletal muscles and bones (with about 206 of the latter in adults), moves the body and protectively houses its internal organs. (3) The respiratory system, composed of the breathing passages, lungs, and muscles of respiration, obtains from the air the oxygen necessary for cellular metabolism; it also returns to the air the carbon dioxide that forms as a waste product of such metabolism. (4) The circulatory system, composed of the heart, blood, and blood vessels, circulates a transport fluid throughout the body, providing the cells with a steady supply of oxygen and nutrients and carrying away waste products such as carbon dioxide and toxic nitrogen compounds. (5) The digestive system, composed of the mouth, esophagus, stomach, and intestines, breaks down food into usable substances (nutrients), which are then absorbed from the blood or lymph; this system also eliminates the unusable or excess portion of the food as fecal matter. (6) The excretory system, composed of the kidneys, ureters, urinary bladder, and urethra, removes toxic nitrogen compounds and other wastes from the blood. (7) The nervous system, composed of the sensory organs, brain, spinal cord, and nerves, transmits, integrates, and analyzes sensory information and carries impulses to effect the appropriate muscular or glandular responses. (8) The endocrine system, composed of the hormone-secreting glands and tissues, provides a chemical communications network for coordinating various body processes. (9) The reproductive system, composed of the male or female sex organs, enables reproduction and thereby ensures the continuation of the species.

Basic form and development

In general structure, the human body follows a plan that can be described as a cylinder enclosing two tubes and a rod. This body plan is most clearly evident in the embryo; by birth, the plan is apparent only in the trunk region—i.e., in the thorax and abdomen.

The body wall forms the cylinder. The two tubes are the ventrally located alimentary canal (i.e., the digestive tract) and the dorsally located neural tube (i.e., the spinal cord). Between the tubes lies the rod—the notochord in the embryo, which becomes the vertebral column prior to birth. (The terms dorsal and ventral refer respectively to the back and the front, or belly, of an animal.)

Within the embryo, the essential body parts are:

(1) the outer enclosing epidermal membrane (in the embryo called ectoderm).

(2) the dorsal neural tube.

(3) the supporting notochord.

(4) the ventral alimentary tube, which becomes the lining of the stomach and intestine (in the embryo called endoderm).

(5) the intermediate mass (in the embryo called mesoderm).

(6) a rather fluid tissue that fills the interspaces, derived from the mesoderm and in the embryo called mesenchyme. Everything in the body derives from one of these six embryonic parts.

The mesoderm constitutes a considerable pad of tissue on each side of the embryo, extending all the way from the back to the front sides of the body wall. It is hollow, for a cleftlike space appears in it on each side. These are the right and left body cavities. In the dorsal part of the body they are temporary; in the ventral part they become permanent, forming the two pleural cavities, which house the lungs; the peritoneal cavity, which contains the abdominal organs; and the pericardial cavity, which encloses the heart. The dorsal part of the mesoderm becomes separated from the ventral mesoderm and divides itself into serial parts like a row of blocks, 31 on each side. These mesodermal segments grow in all directions toward the epidermal membrane. They form bones, muscles, and the deeper, leathery part of the skin. Dorsally they form bony arches protecting the spinal cord, and ventrally the ribs protecting the alimentary canal and heart. Thus they form the body wall and the limbs—much the weightier part of the body. They give the segmental character to the body wall in neck and trunk, and, following their lead, the spinal cord becomes correspondingly segmented. The ventral mesoderm is not so extensive; it remains near the alimentary tube and becomes the continuous muscle layer of the stomach and intestine. It also forms the lining of the body cavities, the smooth, shining, slippery pleura and peritoneum. The mesenchyme forms blood and lymph vessels, the heart, and the loose cells of connective tissues.

The neural tube itself is formed from the ectoderm at a very early stage. Anteriorly (i.e., toward the head) it extends above the open end of the cylinder and is enlarged to form the brain. It is not in immediate contact with the epidermis, for the dorsal mesoderm grows up around it and around the roots of the cranial nerves as a covering, separating the brain from the epidermis. Posteriorly the neural tube terminates in the adult opposite the first lumbar vertebra.

If the cylindrical body wall is followed headward, it is found to terminate ventrally as the tongue, dorsally in the skull around the brain, ears, and eyes. There is a considerable interval between eyes and tongue. This is occupied partly by a deep depression of the epidermis between them, which dips in to join the alimentary tube (lining of the mouth). Posteriorly the ventral body wall joins the dorsal at the tailbone (coccyx), thus terminating the body cavities.

Headward, the alimentary tube extends up in front of the notochord and projects above the upper part of the body wall (tongue) and in front of and below the brain to join the epidermal depression. From the epidermal depression are formed the teeth and most of the mouth lining; from the upper end of the alimentary canal are formed the pharynx, larynx, trachea, and lungs. The alimentary canal at its tail end splits longitudinally into two tubes—an anterior and a posterior. The anterior tube becomes the bladder, urethra, and, in the female, the lining of the vagina, where it joins a depression of the ectoderm. The posterior (dorsal) tube becomes the rectum and ends just in front of the coccyx by joining another ectodermal depression (the anus).

Machines are man-made so humans and machines work differently. Machines were created to make human life easier. A single gadget engine consists of different components. Some people believe that AI works better than the human brain when it has AI vs human brain. As time goes on people keep running the machines. People had to work together because communication through electronics was not possible. We are happy to accurately evaluate and solve our problems with people.

Man vs machine
Machines are the creation of mankind
Humans were created from flesh and blood, and they have life. Individuals have feelings and emotions, expressing different emotions at different times. Machines operate from their own man-made mechanical brain. People understand things and respond appropriately and therefore have no understanding of machines.

People are older and self-centered people. They create and invent new things but machines cannot do this kind of work because they use AI. Machines work and are man-made. People are blessed with ingenuity and emotion, but machines have AI. Humans have different abilities such as language, pattern recognition and artistic thinking.

Impact of technology on human health
Machinery and technology replace many workloads and this is often the biggest reason for lack of jobs and hence the backlog of kits. As people are replaced by machines, some jobs are also done. Industrial change also led to unemployment and, as a result, the loss of middle-class talent in various fields.

Other effects of the machine on humans are efficiency, war and destruction.

Environmental pollution has increased due to increasing vehicle consumption. The impact of technology on our environment is complex and we are dealing with severe global climate change such as warming that can lead to many diseases in humans. Machines are facing the extinction of many bird, plant and animal species due to global climate change.

Starfish (or sea stars) are beautiful marine animals found in a variety of colors, shapes, and sizes. All starfish resemble stars, and though the most common have only five arms, some of these animals can grow up to 40 arms. The amazing sea creatures—part of a group of animals known as echinoderms—travel using their tube feet. They can regenerate lost limbs and swallow large prey using their unusual stomachs.

Sea Stars Are Not Fish

Although sea stars live underwater and are commonly called “starfish,” they are not true fish. They do not have gills, scales, or fins like fish do.

Sea stars also move quite differently from fish. While fish propel themselves with their tails, sea stars have tiny tube feet to help them move along.

Because they are not classified as fish, scientists prefer to call starfish “sea stars.”

Sea Stars Are Echinoderms

Sea stars belong to the phylum Echinodermata. That means they are related to sand dollars, sea urchins, sea cucumbers, and sea lilies. Overall, this phylum contains approximately 7,000 species.

Many echinoderms exhibit radial symmetry, meaning their body parts are arranged around a central axis. Many sea stars have five-point radial symmetry because their body has five sections. This means that they do not have an obvious left and right half, only a top side and a bottom side. Echinoderms also usually have spines, which are less pronounced in sea stars than they are in other organisms such as sea urchins.

There Are Thousands of Sea Star Species

There are about 2,000 species of sea stars.2 Some live in the intertidal zone, while others live in the deep water of the ocean. While many species live in tropical areas, sea stars can also be found in cold areas—even the polar regions.

Not All Sea Stars Have Five Arms

While many people are most familiar with the five-armed species of sea stars, not all sea stars have just five arms. Some species have many more, such as the sun star, which can have up to 40 arms.

Sea Stars Can Regenerate Arms

Amazingly, sea stars can regenerate lost arms, which is useful if a sea star is injured by a predator. It can lose an arm, escape, and grow a new arm later.

Sea stars house most of their vital organs in their arms. This means that some species can even regenerate an entirely new sea star from just one arm and a portion of the star’s central disc. This won’t happen too quickly, though; it takes about a year for an arm to grow back.

Sea Stars Are Protected by Armor

Depending on the species, a sea star’s skin may feel leathery or slightly prickly. Sea stars have a tough covering on their upper side, which is made up of plates of calcium carbonate with tiny spines on their surface.

A sea star’s spines are used for protection from predators, which include birds, fish, and sea otters. One very spiny sea star is the aptly named crown-of-thorns starfish.

Sea Stars Do Not Have Blood

Instead of blood, sea stars have a circulatory system made up primarily of seawater.

Seawater is pumped into the animal’s water vascular system through its sieve plate. This is a sort of trap door called a madreporite, often visible as a light-colored spot on the top of the starfish.

From the madreporite, seawater moves into the sea star’s tube feet, causing the arm to extend. Muscles within the tube feet are used to retract the limb.

Sea Stars Eat With Their Stomachs Inside-Out

Sea stars prey on bivalves like mussels and clams as well as small fish, snails, and barnacles. If you’ve ever tried to pry the shell of a clam or mussel open, you know how difficult it is. However, sea stars have a unique way of eating these creatures.

A sea star’s mouth is on its underside. When it catches its food, the sea star will wrap its arms around the animal’s shell and pull it open just slightly. Then it does something amazing: the sea star pushes its stomach through its mouth and into the bivalve’s shell. It then digests the animal and slides its stomach back into its own body.

This unique feeding mechanism allows the sea star to eat larger prey than it would otherwise be able to fit into its tiny mouth.

Sea Stars Have Eyes

Many people are surprised to learn that starfish have eyes. It’s true. The eyes are there—just not in the place you would expect.

Sea stars have an eye spot at the end of each arm. This means that a five-armed sea star has five eyes, while the 40-armed sun star has 40 eyes.

Each sea star eye is very simple and looks like a red spot. It doesn’t see much detail but it can sense light and dark, which is just enough for the environments the animals live in.

All True Starfish Are in the Class Asteroidea

Starfish belong to the animal class Asteroidea. These echinoderms all have several arms arranged around a central disk.

Asteroidea is the classification for “true stars.” These animals are in a separate class from brittle stars and basket stars, which have a more defined separation between their arms and their central disk.

Types of Materials For Dresses– There is an assortment of textiles fabrics which are available in the market nowadays. If you are having an issue with the laundries, or get caught in other dilemmas. Then might be you apparently don’t know the characteristics of different types of fabrics and it’s properties.

The content of fiber and how the material is produced makes a tremendous variation in spot removal and it also defines how a garment should be washed. For genuine fine results, it is suitable to have a twitching knowledge of different types of fabric materials of dresses. The Dictionary of textile will help you interpret apparel caring labels. Each one of us carries clothes made up of different fabrics.

Different Types of Fabrics – Types of Materials For Dresses

If you are having an issue with the laundries, or get caught in other dilemmas. Then might be you apparently don’t know the characteristics of different types of fabrics and it’s properties. The content of fiber and how the material is produced makes a tremendous variation in spot removal and it also defines how a garment should be washed.

For genuine fine results, it is suitable to have a twitching knowledge of different types of dress materials. The Dictionary of textile will help you interpret apparel caring labels. Each one of us carries clothes made up of different fabrics material types.

Here are the most popular fabrics used for clothing attire are:

1. Cotton Fabric

Cotton is a natural fabric, most soothing and skin friendly, light thin and soft. Hence, cotton is available in all colors. It really breathes well but does not dry quickly. It is one of the most popular and used fabrics in the world. It is most used type of fabric for kurtis. Mostly used in kurti, saree, suit set, jump suits, pants.

2. Silk Fabric

Silk is well known for its luxurious, smooth, soft touch and glistening looks. It is the most durable and strongest natural fabric. Mostly used in Sarees, wedding gowns, evening gowns, and scarves.

3. Linen Fabric

Linen is very strong and durable material. It is smooth and very cool to touch. It needs regular ironing as it absorbs water very fast. Linen fabric has been practiced for table coverings, bed coverings, and apparel for eras.

4. Wool Fabric

Wool is soft to touch, durable and long-lasting which keeps the body warm in winters. It is wrinkle free and resistant to dust, fade and tear. Mostly used in sweaters woolen socks, woolen gloves, and other warm clothes.

5. Leather Material

The leather is also used to keep a body warm in winter. It is both strong and stylish It gives a very classy look. Frequently used in jackets, shoes, belts and other fashion accessories.

6. Georgette Fabric

Georgette is a lightweight, dull appearance and creped surface fabric. It is opaque and slightly heavier than chiffon. It is available in grams in weight like 20 grams, 40 grams, 60 grams depends upon the purpose of use. Georgette is much in demand in the fashion industry. Most of the designer clothes are made from Georgette.

7. Chiffon Fabric

Chiffon is very insubstantial fabric originally manufactured from silk. Though it is smoother than Georgette. It can be easily dyed to any color and used for evening wear, gowns, sarees.

8. Nylon Fabric

Nylon is a synthetic fabric made up of polymers. It is a strong fabric with stretchable and high elasticity properties. It is very long lasting and unaffected by wear and tear. This fabric is extremely immune to attack from such typical repellent as rusts, fungi, and insects.

9. Polyester Fabric

Polyester is also a synthetic fabric made up of the polymer. It is strong, soft and wrinkles free textile and hence used in clothing. This textile is an artificially made fiber. It’s much rebounding and can resist a good chance of wear and tear outfit.

10. Velvet Fabric

Velvet is very soft and smooth material, very luxurious and shiny, it comes in different qualities and textures, ranging from low to very high prices. Coarse to the very thin fiber material. Chiefly used in blouses, shawls, lenghas and Indian wedding dress in winters.

11. Denim Fabric

Denim is sturdy rugged cotton twill, colored with indigo dye to create blue jeans mostly. It has a vivid texture, cozy to feel, and very long durability. Denim is the most widely available fabric for jeans.

12. Rayon Fabric

Rayon is created from cellulose fiber. It’s is famous for its smooth texture and look which closely resembles the feel and appearance of silk and wool. It is highly absorbent and does not insulate the body heat due to this property it is very useful for summer and humid conditions.

13. Viscose Fabric

Viscose is also manufactured from cellulose. It feels soft and smooth as similar to Rayon on the skin. This fabric is mostly used in gowns lining, shirts and jackets.

14. Satin Fabric

Satin FabricSatin is originally made from silk. Satin is famous for its evening gowns, skirts, corsets, inner lining, wedding dresses, loungewear, hats, and ties. In particular, this is the softer and brighter the further clean and easier to keep clean.

15. Crepe Fabric

Crepe is twisted weave fabric does not wrinkle or crease easily. It is rich in texture and style and is fairly easy to work with. It varies in weight and capacity. It is a feather soft material which has excellent draping qualities. Crepe is soft, very comfy to wear and easy to care.

In a world where entertainment is right in our hands,you may ask yourself, what is the point of reading? In today’s fast pace world, reading is becoming a dying habit because there are fast alternatives to consume on social media. Let’s look at some top 10 reasons on why reading is important and why you should read.

1. Reading is food for the brain.

Just like how our body needs food to sustain itself and function optimally, our brain needs to continue learn new things to function at peak performance. The best part is you can read friction and non-friction to get this benefit.

Studies have shown that that reading has the power to change your brain structure which makes you more empathetic and improves cognitive processes. By reading more, you become smarter since you’re consuming a lot of information and you keep your brain in top shape.

There’s a quote from Game of Thrones that sums up this point nicely.

My brother has his sword, King Robert has his Warhammer, I have my mind… and a mind needs books as a sword needs a whetstone if it is to keep it’s edge

Tyrion Lannister

2. You become better at conversations.

Books help expand your vocabulary which you can then use to express yourself better. You speech will then be more refined and intelligent. Also since reading widen your knowledge, you are empowered to participant in an interesting conversation.

With the knowledge you gained from reading you can add a unique perspective or sustain your argument. In this case, reading non-friction can be better because you can learn about topics that show up more often in a regular conversation like technology.

But there are also instances where reading friction can be better like when there’s a new popular movie out based on a book and you read the original source material.

3. You can get mentored by a successful people for a very cheap price.

Think about how much successful person’s knowledge is worth. People are willing to pay millions to have lunch with Warren Buffett. If you’re a normal person, you don’t have that kind of money. But with books you get mentored by a successful person for less than ₹3,000.

A book is literally the exact words, ideas, advice, mindsets and even the experience of the author that puts into a collection of papers. It’s almost like if the person in right there next to you speaking to you.

75% of self made millionaires reported that they read at least 2 books a month. The knowledge you can get from reading is irreplaceable.

4. Reading improves focus and concentration.

In our fast pace world today, our attention span are really short. Reading a book can help fix this because when you read your attention is only focused on the story and you can be fully immersed. You might even achieve a flow state where you are 100% focused and forget about the world around you.

Try reading for 10-20 mins before work on your morning commute and you might find yourself more focused and productive at the office.

5. Reading opens your mind.

As a reader, you will interact with different stories from different people with different ideas and beliefs. This helps open your mind and be more accepting of others as well as improve your ability to judge other people’s character.

6. Reading helps relax you.

When you’re reading something good, your mind is more relaxed and the subject you are reading about might even bring inner peace.

If you’re reading friction, while you may not be fed the image and sound like when you are watching a movie, you can experience the images and sound with your own imagination.

The feeling you get from finishing a book can be better than the feeling of finishing a Netflix episode.

7. Reading helps improve your memory.

Whether you are following your favorite character through their journey or remembering tips on how to make more money, you will be using the memory area of your brain and keep it active. When you really need to remember something important, it will be easier.

Every new memory you make creates synapses or brain pathways and strengthens existing ones so memorizing will get easier.

8. Reading helps you make decisions better.

When you are armed with all sorts of knowledge, make decision can be easier because you see all possible options. You can make educated guesses on how each choice will play out and pick the one you like best.

9. Reading can help you sleep better.

It can be hard to sleep when there’s a lot of things going on in your mind. Reading for a short period of time can help push away what is bothering you internally.

Also, we often use electronics late at night which don’t exactly helps us sleep better because bright light signal our brain it’s time to wake up. Reading a book can help instead but make sure you put it down once it’s time to sleep.

10. You become who you are ment to be.

By reading, you can change your personality or beliefs. Books open up completely new worlds for us to grow and develop as a person.

“Water is life” Not only the human being but also for the entire ecosystem water is precious. We all depend on water for many purposes. Water is transparent but it takes the shape of anything when we put it, it’s a pure thing.71 percent of the land is covered by the water on the earth. In which 97 percent of the water is covered by the ocean and only 3 percent of water is in use for drinking and many purposes. It is important to save the water for us and for our future because we totally depend on the water for various purposes. Here we are providing the essay on the save water for informing the importance of water to the students and children for saving the water.

Introduction

The source of the water is in the form of lakes, rivers, ponds, wells, etc. On the earth’s surface, there is 71 percent of the land is covered by the water and the other 29 percent by the land. In that 71 percent of water, only 3 percent of water is usable which is used by us for many purposes. So it’s not enough water for such large populated countries. As the population is increasing day by day the consumption of the water is also increased. Nowadays public using the water not in a careful manner. They are careless about it.

For example, a kid washing the hands but opened the tap but forgets to close it. So here water is wasting. In some areas like Rajasthan where the temperature of the weather is too hot, the sources of the drinking water are very less. They have to search for the water for miles and miles. So each and every drop of the water is the savior for someone.

Even Farmers want water for cultivating the land. If the lord of the rain is not happy and some places like Rajasthan, Vidarbha in Maharashtra which having the less source of water than it would be difficult for the farmers to cultivate the land. So their life will be ruined because of their income totally depends on the farming which can lead to the farmer to select the option of the suicide.

Different uses of the Water.

1.Water in Agriculture

It is the important role of the water in agriculture. The crop season requires irrigation which is used for agriculture to the proper growth of plants. If there are proper sources of water for farming then farmers are also happy which makes the crops or farms wealthy.

2.Water used for balancing the ecosystem

Not only for human beings is but also important for the entire ecosystem in different ways. Because of the presence of the water in the atmosphere which can absorb the Sun’s rays or heat. The rivers and valleys and other water sources are filled with rainwater.

3.Water for industries

In many industries like the steel industry, chemicals, fertilizers, electricity, textiles, petrochemicals and paper, food, Mining, etc. water is used in huge quantities for cooling purposes, generation of power, cleaning purposes, fire protection and last but not in list air cooling.

4.Water for power

The large volume of water for the purpose of cooling and disposal of fly ash is required for the Thermal power. In the generation of thermal power, water is used.

5.Water for fish, wildlife and recreation

6.Water for household uses

How to save water

1.It is an individual responsibility to save the water and reduce the consumption of the water except the drinking and cooking purposes. We can reduce the consumption of water by proper using of water for the toilet, showering, etc.

2.We can save water per day by slightly saving water from the watering garden, flushing toilet, cleaning purposes, etc.

3.For purposes like toilet flushing, laundry, watering garden, showering, etc. we should use rainwater.

4.Avoid taking a shower for bathing, use the water in the bucket by us in this way we can save 150 to 200 liters of water every day.

5.Rainwater harvesting is one of the best options to save water.

6.We can save 4500 liters of the water per month if we use the washing machine to wash clothes when clothes have to machines capacity.

7.Turn off all the taps after the using water, close it tightly it saves more than 200 liters of water.

8.In the festival of Holi use the dry colors instead of using water and promote playing Holi by using less water.

9.Be aware of the news of people who struggle a lot for searching daily for a drop of water to save us from water wastage.

10.Promote Water conservation programs to spread awareness among the people.

11.Use water in cooler only when required, do not waste it.

12.Do not waste water by sprinkling on house or streets, its just wastage of water.

13.The rainy season promotes tree plantation so because of that plants get water easily through rainwater.

14.Avoid watering plants in the afternoon time especially 11 am to 4 am as the sun rays evaporated so instead of watering plants in the noon water plants early in the mornings or evenings.

Conclusion

Water is life for human beings as well as for our ecosystem also. Saving water is important for us and for our future generation also. We are dependent on water for many purposes. Water is the boon for us which granted by God so we should use the water properly. In some areas where the shortage of water is, they know the value of it. Water is precious for us, ”SAVE WATER SAVE LIFE”.

1.Air pollution is one of the UK’s (and the world’s) biggest killers

Breathing in air pollution can increase the risk of heart disease and stroke. It worsens asthma symptoms and can even cause lung cancer.

To address this, as a first step we are calling on the government to phase-out of diesel vehicles by 2025.

Worldwide, the human costs of indoor and outdoor air pollution are terrible – millions of premature deaths each year  are linked to air pollution.

2.Children are most vulnerable to air pollution – but we are all affected

The impacts of toxic air are worse for the most vulnerable people. Air pollution damages children’s lung development. It also makes existing respiratory and cardiovascular conditions worse, particularly in older people. The poorest people in our society tend to suffer more as they tend to live near main roads where air pollution is worst.

All road users are affected by air pollution. However, pedestrians and cyclists are often exposed to less air pollution than people in vehicles, especially if using backstreets.

3.A child born today might not breathe clean air until they are 8

Long-term childhood exposure to air pollution can lead to permanently reduced lung function. Dirty air has been shown to affect the development of foetuses as well.  

Most areas of the UK are breaking EU limits on air pollution. Yet the government’s current plans won’t reduce pollution to legal levels until at least 2020 – and in London, 2025.

4.Air pollution causes up to 36,000 early deaths a year in the UK

Outdoor air pollution is responsible for the equivalent of up to 36,000 premature deaths a year in the UK, says the government’s Committee on the Medical Effects of Air Pollutants (COMEAP ).

Fine particle air pollution is responsible for 29,000 early deaths a year. The effect of the toxic gas nitrogen dioxide (NO2) brings the figure up to 36,000 a year.

5. Air pollution was bad then…

In the 1970s the UK was known as the Dirty Man of Europe.

Pollution from the UK’s coal-fired power stations caused acid rain. Forests across Europe withered. EU action thankfully put an end to this.

As a result, sulphur dioxide emissions dropped by 94% by 2011 . This prevented an estimated 46,000 premature deaths between 1990 and 2001.

6. And air quality is still bad now

Invisible pollution claims more than 9,000 early deaths each year in London.

London’s air is some of the dirtiest in Europe. In 2016 the government was ordered by the High Court to come up with a plan to clean up air across the UK in the shortest possible time.

7. Five days into 2017 annual air pollution limits in London were breached

Just 5 days into the new year Brixton Road in London breached air pollution limits for the whole of 2017.

EU air pollution rules say monitoring stations must not record particularly high levels of nitrogen dioxide more than 18 times a year at any given location. But Brixton Road, in London, exceeded this limit for the 19th time on 5 January 2017.

A number of other London locations, including Putney High Street and Brompton Road in Knightsbridge, followed shortly.

8. Sitting inside a car can be more dangerous for your health

Being shut inside a car may not protect you from pollution. In fact, you can be exposed to almost 8 times as much as a cyclist .

When driving in heavy traffic, use the recycled-air setting on your fan so your car doesn’t suck in harmful fumes.

9. Two thirds of all UK car journeys are under 5 miles

By leaving your car at home, you are helping reduce air pollution for everyone. You can make it safer for yourself by avoiding busy main roads when walking.

But if you can’t avoid a main road, walk as far away from the kerb as you can – even a few metres can make a difference to your level of pollution exposure.

10. About 11 million cars were designed to cheat air pollution tests

It has long been known that diesel cars pollute far more in the real world than in laboratory tests. A 2016 study by the Department for Transport confirmed this, finding that all diesel cars tested produced more pollution on the road than in the laboratory  – some emitted up to 12 times the EU maximum.

Worse still, in 2015 car manufacturer Volkswagen was caught using software programmes to cheat emissions tests.

Volkswagen eventually admitted to fitting this software to millions of its diesel vehicles. Basically they were programmed to spew out less filth in the lab than on the road.

The ramifications of this shocking deception continue to rumble on, with record fines imposed on Volkswagen in the US and legal action mooted in Europe.

11. There’s been a 26-fold increase in electric cars in the UK in the past 4 years

Tax incentives for low- and zero-emission cars are an essential part of the solution to air pollution. But so is massive investment in clean public transport and better integrated walking and cycling routes, to help people get out of their cars altogether.

Fact: In the past 4 years, the number of registered electric cars in the UK has increased by around 2,600%.

New registrations of electric cars rose from 3,500 in 2013 to almost 95,000  by the end of March 2017. Data from the Society of Motor Manufacturers and Traders show that around 500 electric cars were registered per month during the first half of 2014. By the end of 2016, more than 35,000 plug-in cars had been registered over the course of the year – the highest number ever – and an average of over 3,000 per month.

There are plans in the Netherlands and Norway to halt the sale of diesel and petrol cars entirely from 2025. Friends of the Earth is calling for similarly radical action in the UK.

12. There are around 12 million diesel cars on UK roads

Diesel vehicles now represent more than 40% of new car sales in the UK , up from around 13% little more than a decade ago. There are approximately 12 million diesel cars on the road in the UK at the moment.

This is largely the result of government incentives based on the carbon savings and greater fuel efficiency of diesel compared to petrol. Diesel cars produce high levels of deadly NOx, more than their petrol equivalents.

13. Air pollution costs the UK £20 billion a year

The health problems resulting fromexposure to air pollution have a high cost to people  who suffer from illness, to our health services and to businesses. In the UK these costs add up to more than £20 billion every year.

Not only does air pollution cost our health service and result in worse productivity due to ill-health, but measures to cut air pollution are beneficial to business. Strong action on air pollution can drive green innovation, and if traffic levels are cut so should congestion. Less congestion and air pollution would make our cities and towns more attractive places to live and work and visit.

14. The global cost of air pollution is staggering

The global cost of air pollution is US$225 billion annually, according to the World Bank.

A study by the World Bank and the Institute for Health Metrics and Evaluation (IHME) highlights the eye-watering economic and social impacts of dirty air. It makes clear what’s fairly obvious: polluted places are less productive, see fewer tourists, and put off potential workers.

In asurvey of the world’s liveable cities  – London came 38th due to traffic and air pollution.

15. Air pollution makes climate change worse

As well as fine particle air pollution directly affecting the climate , many of the causes of air pollution – such as traffic emissions – are also contributors to climate change.

There are strong benefits  from tackling these issues together.

16. The smallest particles are the most dangerous

The most dangerous tiny particles of air pollution are smaller than the width of a human hair. This means they are largely invisible. And they can penetrate deep into our lungs.

Particle air pollution  worsens heart and lung disease.

17. That orange haze is nitrogen dioxide… and it’s toxic

Nitrogen dioxide – also known as NO2 – gets worse the closer you go to road traffic.

It is a toxic gas which is often colourless. This means you often won’t be able to see it, although sometimes an orange haze can be seen hanging over a city from a distance.

NO2 inflames the lining of the lung  and reduces immunity to lung infections such as bronchitis.

18. Diesel exhaust causes cancer

The World Health Organisation (WHO) has declared outdoor air pollution, including particulate matter (PM) and also diesel exhaust, carcinogenic to humans, in the strongest class (Group 1). That’s the same class as tobacco.

19. Time of day matters

The best time to run or jog is generally first thing in the morning, before the day’s traffic affects air quality.

If you can, try to exercise in green leafy spaces like parks. It will make a big difference – joggers inhale more pollution than those walking the same distance.

20. Plants can filter pollution

Our homes are vulnerable to noxious gases which can build up over time.

Readily-available houseplants can help filter some harmful compounds out. Helpful plants include: peace lilies, English ivy, cornstalk dracaena and broadleaf lady palm.

The brain is one of the largest and most complex organs in the human body.
It is made up of more than 100 billion nerves that communicate in trillions of connections called synapses.

The brain is made up of many specialized areas that work together:
• The cortex is the outermost layer of brain cells. Thinking and voluntary movements begin in the cortex.
• The brain stem is between the spinal cord and the rest of the brain. Basic functions like breathing and sleep are controlled here.
• The basal ganglia are a cluster of structures in the center of the brain. The basal ganglia coordinate messages between multiple other brain areas.
• The cerebellum is at the base and the back of the brain. The cerebellum is responsible for coordination and balance.

The brain is also divided into several lobes:
• The frontal lobes are responsible for problem solving and judgment and motor function.
• The parietal lobes manage sensation, handwriting, and body position.
• The temporal lobes are involved with memory and hearing.
• The occipital lobes contain the brain’s visual processing system.

The brain is surrounded by a layer of tissue called the meninges. The skull (cranium) helps protect the brain from injury

Brain Conditions

* Headache: There are many types of headaches; some can be serious but most are not and are generally treated with analgesics/painkillers.
* Stroke (brain infarction): Blood flow and oxygen are suddenly interrupted to an area of brain tissue, which then dies. A blood clot, or bleeding in the brain, are the cause of most strokes.
* Brain aneurysm: An artery in the brain develops a weak area that swells, balloon-like. A brain aneurysm rupture can causes a stroke.
* Subdural hematoma: Bleeding within or under the dura, the lining inside of the skull. A subdural hematoma may exert pressure on the brain, causing neurological problems.
* Epidural hematoma: Bleeding between the tough tissue (dura) lining the inside of the skull and the skull itself, usually shortly after a head injury. Initial mild symptoms can progress rapidly to unconsciousness and death, if untreated.
* Intracerebral hemorrhage: Any bleeding inside the brain.

* Concussion: A brain injury that causes a temporary disturbance in brain function. Traumatic head injuries cause most concussions.
* Cerebral edema: Swelling of the brain tissue in response to injury or electrolyte imbalances.
* Brain tumor: Any abnormal tissue growth inside the brain. Whether malignant (cancer) or benign, brain tumors usually cause problems by the pressure they exert on the normal brain.
* Glioblastoma: An aggressive, malignant brain tumor (cancer). Brain glioblastomas progress rapidly and are very difficult to cure.
* Hydrocephalus: An abnormally increased amount of cerebrospinal (brain) fluid inside the skull. Usually this is because the fluid is not circulating properly.
* Normal pressure hydrocephalus: A form of hydrocephalus that often causes problems walking, along with dementia and urinary incontinence. Pressures inside the brain remain normal, despite the increased fluid.

* Encephalitis: Inflammation of the brain tissue, usually from infection with a virus. Fever, headache, and confusion are common symptoms.
* Traumatic brain injury: Permanent brain damage from a traumatic head injury. Obvious mental impairment, or more subtle personality and mood changes can occur.
* Parkinson’s disease: Nerves in a central area of the brain degenerate slowly, causing problems with movement and coordination. A tremor of the hands is a common early sign.
* Huntington’s disease: An inherited nerve disorder that affects the brain. Dementia and difficulty controlling movements (chorea) are its symptoms.
* Epilepsy: The tendency to have seizures. Head injuries and strokes may cause epilepsy, but usually no cause is identified.
* Dementia: A decline in cognitive function resulting from death or malfunction of nerve cells in the brain. Conditions in which nerves in the brain degenerate, as well as alcohol abuse and strokes, can cause dementia.

* Alzheimer’s disease: For unclear reasons, nerves in certain brain areas degenerate, causing progressive dementia. Alzheimer’s disease is the most common form of dementia.
* Brain abscess: A pocket of infection in the brain, usually by bacteria. Antibiotics and surgical drainage of the area are often necessary.

Brain Tests

• Computed tomography (CT scan): A scanner takes multiple X-rays, which a computer converts into detailed images of the brain and skull.
• Magnetic resonance imaging (MRI scan): Using radio waves in a magnetic field, an MRI scanner creates highly detailed images of the brain and other parts of the head.
• Angiography (brain angiogram): A special substance doctors call “a contrast agent” is injected into the veins, and travels into the brain. X-ray videos of the brain are taken, which can show problems in the brain’s arteries.
• Magnetic resonance angiography (MRA): A special MRI scan of the brain’s arteries. An MRA scan may show a blood clot or another cause for stroke.
•Lumbar puncture (spinal tap): A needle is inserted into the space around the spinal nerves, and fluid is removed for analysis. Lumbar puncture is often done if meningitis is suspected.

• Electroencephalogram (EEG): Brain activity is monitored through electrodes placed on the skin on the head. EEG can help diagnose seizures, or other brain problems.
• Neurocognitive testing: Tests of problem-solving ability, short-term memory, and other complex brain functions. Usually, neurocognitive testing is done through questionnaires.
• Brain biopsy: In rare situations, a very small piece of the brain is needed to make the diagnosis of a brain condition. Brain biopsies are generally done only when the information is needed to provide proper treatment

Brain Treatments

* Thrombolytics: Clot-busting medicines injected into the veins can improve or cure some strokes if given within a few hours after symptoms start.
* Antiplatelet agents: Medicines like aspirin and clopidogrel (Plavix) help prevent blood clots. This can reduce the chance of a stroke.
* Cholinesterase inhibitors: These medicines can improve brain function slightly in mild or moderate Alzheimer’s disease. They do not slow or prevent Alzheimer’s disease.
* Antibiotics: When a brain infection is caused by bacteria, antibiotics can kill the organisms and make a cure more likely.
* Levodopa: A medicine that increases brain levels of dopamine, which is helpful in controlling symptoms of Parkinson’s disease.
* Brain surgery: An operation on the brain can cure some brain tumors. Brain surgery may be performed any time increased pressure in the brain threatens brain tissue.

* Ventriculostomy: A drain is placed into the natural spaces inside the brain (ventricles). Ventriculostomy is usually performed to relieve high brain pressures.
* Craniotomy: A surgeon drills a hole into the side of the skull to relieve high pressures.
* Lumbar drain: A drain is placed into the fluid around the spinal cord. This can relieve pressure on the brain and spinal cord.
* Radiation therapy: If cancer affects the brain, radiation can reduce symptoms and slow the cancer’s growth.

Water (chemical formula H2O) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth’s hydrosphere and the fluids of all known living organisms (in which it acts as a solvent[1]). It is vital for all known forms of life, even though it provides no calories or organic nutrients. Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°.[2] “Water” is the name of the liquid state of H2O at standard conditions for temperature and pressure.

A globule of liquid water, and the concave depression and rebound in water caused by something dropping through the water surface

A block of solid water (ice)

Clouds in Earth’s atmosphere condense from gaseous water vapor.

A number of natural states of water exist. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds consist of suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of water is steam or water vapor.

Water covers approximately 70.9% of the Earth’s surface, mostly in seas and oceans.Small portions of water occur as groundwater (1.7%), in the glaciers and the ice caps of Antarctica and Greenland (1.7%), and in the air as vapor, clouds (consisting of ice and liquid water suspended in air), and precipitation (0.001%).Water moves continually through the water cycle of evaporation, transpiration (evapotranspiration), condensation, precipitation, and runoff, usually reaching the sea.

Water plays an important role in the world economy. Approximately 70% of the freshwater used by humans goes to agriculture.[6] Fishing in salt and fresh water bodies is a major source of food for many parts of the world. Much of the long-distance trade of commodities (such as oil, natural gas, and manufactured products) is transported by boats through seas, rivers, lakes, and canals. Large quantities of water, ice, and steam are used for cooling and heating, in industry and homes. Water is an excellent solvent for a wide variety of substances both mineral and organic; as such it is widely used in industrial processes, and in cooking and washing. Water, ice and snow are also central to many sports and other forms of entertainment, such as swimming, pleasure boating, boat racing, surfing, sport fishing, diving, ice skating and skiing.

Chemical and physical properties

Water (H2O) is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, nearly colorless with a hint of blue. This simplest hydrogen chalcogenide is by far the most studied chemical compound and is described as the “universal solvent” for its ability to dissolve many substances.[8][9] This allows it to be the “solvent of life”:[10] indeed, water as found in nature almost always includes various dissolved substances, and special steps are required to obtain chemically pure water. Water is the only common substance to exist as a solid, liquid, and gas in normal terrestrial conditions

States

Along with oxidane, water is one of the two official names for the chemical compound H
2O;it is also the liquid phase of H
2O.The other two common states of matter of water are the solid phase, ice, and the gaseous phase, water vapor or steam. The addition or removal of heat can cause phase transitions: freezing (water to ice), melting (ice to water), vaporization (water to vapor), condensation (vapor to water), sublimation (ice to vapor) and deposition (vapor to ice)

Density

Water differs from most liquids in that it becomes less dense as it freezes.In 1 atm pressure, it reaches its maximum density of 1,000 kg/m3 (62.43 lb/cu ft) at 3.98 °C (39.16 °F).The density of ice is 917 kg/m3 (57.25 lb/cu ft), an expansion of 9%.This expansion can exert enormous pressure, bursting pipes and cracking rocks (see Frost weathering).

In a lake or ocean, water at 4 °C (39.2 °F) sinks to the bottom, and ice forms on the surface, floating on the liquid water. This ice insulates the water below, preventing it from freezing solid. Without this protection, most aquatic organisms would perish during the winter.

Phase transitions

At a pressure of one atmosphere (atm), ice melts or water freezes at 0 °C (32 °F) and water boils or vapor condenses at 100 °C (212 °F). However, even below the boiling point, water can change to vapor at its surface by evaporation (vaporization throughout the liquid is known as boiling). Sublimation and deposition also occur on surfaces.For example, frost is deposited on cold surfaces while snowflakes form by deposition on an aerosol particle or ice nucleus.In the process of freeze-drying, a food is frozen and then stored at low pressure so the ice on its surface sublimates.

The melting and boiling points depend on pressure. A good approximation for the rate of change of the melting temperature with pressure is given by the Clausius–Clapeyron relation:

where {\displaystyle v_{\text{L}}}{\displaystyle v_{\text{L}}} and {\displaystyle v_{\text{S}}}{\displaystyle v_{\text{S}}} are the molar volumes of the liquid and solid phases, and {\displaystyle L_{\text{f}}}{\displaystyle L_{\text{f}}} is the molar latent heat of melting. In most substances, the volume increases when melting occurs, so the melting temperature increases with pressure. However, because ice is less dense than water, the melting temperature decreases.In glaciers, pressure melting can occur under sufficiently thick volumes of ice, resulting in subglacial lakes.

The Clausius-Clapeyron relation also applies to the boiling point, but with the liquid/gas transition the vapor phase has a much lower density than the liquid phase, so the boiling point increases with pressure. Water can remain in a liquid state at high temperatures in the deep ocean or underground. For example, temperatures exceed 205 °C (401 °F) in Old Faithful, a geyser in Yellowstone National Park.In hydrothermal vents, the temperature can exceed 400 °C (752 °F).

At sea level, the boiling point of water is 100 °C (212 °F). As atmospheric pressure decreases with altitude, the boiling point decreases by 1 °C every 274 meters. High-altitude cooking takes longer than sea-level cooking. For example, at 1,524 metres (5,000 ft), cooking time must be increased by a fourth to achieve the desired result. (Conversely, a pressure cooker can be used to decrease cooking times by raising the boiling temperature.) In a vacuum, water will boil at room temperature.

Triple and critical points

On a pressure/temperature phase diagram (see figure), there are curves separating solid from vapor, vapor from liquid, and liquid from solid. These meet at a single point called the triple point, where all three phases can coexist. The triple point is at a temperature of 273.16 K (0.01 °C) and a pressure of 611.657 pascals (0.00604 atm); it is the lowest pressure at which liquid water can exist. Until 2019, the triple point was used to define the Kelvin temperature scale.

The water/vapor phase curve terminates at 647.096 K (373.946 °C; 705.103 °F) and 22.064 megapascals (3,200.1 psi; 217.75 atm).This is known as the critical point. At higher temperatures and pressures the liquid and vapor phases form a continuous phase called a supercritical fluid. It can be gradually compressed or expanded between gas-like and liquid-like densities, its properties (which are quite different from those of ambient water) are sensitive to density. For example, for suitable pressures and temperatures it can mix freely with nonpolar compounds, including most organic compounds. This makes it useful in a variety of applications including high-temperature electrochemistry and as an ecologically benign solvent or catalyst in chemical reactions involving organic compounds. In Earth’s mantle, it acts as a solvent during mineral formation, dissolution and deposition.

Phases of ice and water

The normal form of ice on the surface of Earth is Ice Ih, a phase that forms crystals with hexagonal symmetry. Another with cubic crystalline symmetry, Ice Ic, can occur in the upper atmosphere.As the pressure increases, ice forms other crystal structures. As of 2019, 17 have been experimentally confirmed and several more are predicted theoretically.The 18th form of ice, ice XVIII, a face-centred-cubic, superionic ice phase, was discovered when a droplet of water was subject to a shock wave that raised the water’s pressure to millions of atmospheres and its temperature to thousands of degrees, resulting in a structure of rigid oxygen toms in which hydrogen atoms flowed freely.When sandwiched between layers of graphene, ice forms a square lattice.

The details of the chemical nature of liquid water are not well understood; some theories suggest that its unusual behaviour is due to the existence of 2 liquid states.

Taste and odor

Pure water is usually described as tasteless and odorless, although humans have specific sensors that can feel the presence of water in their mouths,and frogs are known to be able to smell it.However, water from ordinary sources (including bottled mineral water) usually has many dissolved substances, that may give it varying tastes and odors. Humans and other animals have developed senses that enable them to evaluate the potability of water by avoiding water that is too salty or putrid.

Color and appearance

Pure water is visibly blue due to absorption of light in the region ca. 600 nm – 800 nm. The color can be easily observed in a glass of tap-water placed against a pure white background, in daylight. The principal absorption bands responsible for the color are overtones of the O–H stretching vibrations. The apparent intensity of the color increases with the depth of the water column, following Beer’s law. This also applies, for example, with a swimming pool when the light source is sunlight reflected from the pool’s white tiles.

In nature, the color may also be modified from blue to green due to the presence of suspended solids or algae.

In industry, near-infrared spectroscopy is used with aqueous solutions as the greater intensity of the lower overtones of water means that glass cuvettes with short path-length may be employed. To observe the fundamental stretching absorption spectrum of water or of an aqueous solution in the region around 3500 cm−1 (2.85 μm) a path length of about 25 μm is needed. Also, the cuvette must be both transparent around 3500 cm−1 and insoluble in water; calcium fluoride is one material that is in common use for the cuvette windows with aqueous solutions.

The Raman-active fundamental vibrations may be observed with, for example, a 1 cm sample cell.

Aquatic plants, algae, and other photosynthetic organisms can live in water up to hundreds of meters deep, because sunlight can reach them. Practically no sunlight reaches the parts of the oceans below 1,000 meters (3,300 ft) of depth.

The refractive index of liquid water (1.333 at 20 °C (68 °F)) is much higher than that of air (1.0), similar to those of alkanes and ethanol, but lower than those of glycerol (1.473), benzene (1.501), carbon disulfide (1.627), and common types of glass (1.4 to 1.6). The refraction index of ice (1.31) is lower than that of liquid water.

Polar molecule

In a water molecule, the hydrogen atoms form a 104.5° angle with the oxygen atom. The hydrogen atoms are close to two corners of a tetrahedron centered on the oxygen. At the other two corners are lone pairs of valence electrons that do not participate in the bonding. In a perfect tetrahedron, the atoms would form a 109.5° angle, but the repulsion between the lone pairs is greater than the repulsion between the hydrogen atoms.The O–H bond length is about 0.096 nm.

Other substances have a tetrahedral molecular structure, for example, methane (CH
and hydrogen sulfide (H2S). However, oxygen is more electronegative (holds on to its electrons more tightly) than most other elements, so the oxygen atom retains a negative charge while the hydrogen atoms are positively charged. Along with the bent structure, this gives the molecule an electrical dipole moment and it is classified as a polar molecule.

Water is a good polar solvent, that dissolves many salts and hydrophilic organic molecules such as sugars and simple alcohols such as ethanol. Water also dissolves many gases, such as oxygen and carbon dioxide—the latter giving the fizz of carbonated beverages, sparkling wines and beers. In addition, many substances in living organisms, such as proteins, DNA and polysaccharides, are dissolved in water. The interactions between water and the subunits of these biomacromolecules shape protein folding, DNA base pairing, and other phenomena crucial to life (hydrophobic effect).

Many organic substances (such as fats and oils and alkanes) are hydrophobic, that is, insoluble in water. Many inorganic substances are insoluble too, including most metal oxides, sulfides, and silicates.

Hydrogen bonding

Because of its polarity, a molecule of water in the liquid or solid state can form up to four hydrogen bonds with neighboring molecules. Hydrogen bonds are about ten times as strong as the Van der Waals force that attracts molecules to each other in most liquids. This is the reason why the melting and boiling points of water are much higher than those of other analogous compounds like hydrogen sulfide. They also explain its exceptionally high specific heat capacity (about 4.2 J/g/K), heat of fusion (about 333 J/g), heat of vaporization (2257 J/g), and thermal conductivity (between 0.561 and 0.679 W/m/K). These properties make water more effective at moderating Earth’s climate, by storing heat and transporting it between the oceans and the atmosphere. The hydrogen bonds of water are around 23 kJ/mol (compared to a covalent O-H bond at 492 kJ/mol). Of this, it is estimated that 90% is attributable to electrostatics, while the remaining 10% is partially covalent.

These bonds are the cause of water’s high surface tension and capillary forces. The capillary action refers to the tendency of water to move up a narrow tube against the force of gravity. This property is relied upon by all vascular plants, such as trees.

Self-ionisation

Water is a weak solution of hydronium hydroxide – there is an equilibrium 2H
2O ⇔ H
3O+
+ OH−
, in combination with solvation of the resulting hydronium ions.

Electrical conductivity and electrolysis

Pure water has a low electrical conductivity, which increases with the dissolution of a small amount of ionic material such as common salt.

Liquid water can be split into the elements hydrogen and oxygen by passing an electric current through it—a process called electrolysis. The decomposition requires more energy input than the heat released by the inverse process (285.8 kJ/mol, or 15.9 MJ/kg)

Mechanical properties

Liquid water can be assumed to be incompressible for most purposes: its compressibility ranges from 4.4 to 5.1×10−10 Pa−1 in ordinary conditions.Even in oceans at 4 km depth, where the pressure is 400 atm, water suffers only a 1.8% decrease in volume.

The viscosity of water is about 10−3 Pa·s or 0.01 poise at 20 °C (68 °F), and the speed of sound in liquid water ranges between 1,400 and 1,540 meters per second (4,600 and 5,100 ft/s) depending on temperature. Sound travels long distances in water with little attenuation, especially at low frequencies (roughly 0.03 dB/km for 1 kHz), a property that is exploited by cetaceans and humans for communication and environment sensing (sonar).

Reactivity

Metallic elements which are more electropositive than hydrogen, particularly the alkali metals and alkaline earth metals such as lithium, sodium, calcium, potassium and cesium displace hydrogen from water, forming hydroxides and releasing hydrogen. At high temperatures, carbon reacts with steam to form carbon monoxide and hydrogen.