For water in its solid state, see ice.
Water is the most common liquid on Earth. It covers about 71.4% of the Earth. Pure water has no smell, taste, or color. Lakes, oceans, and rivers are made of water. Precipitation is water that falls from clouds in the sky. It may be rain (liquid) if warm, or it may be frozen if cold. If water gets very cold (below 0 degrees Celsius), it freezes and becomes ice, the frozen variant of water. If water gets very hot (above 100 degrees Celsius), it boils and becomes steam. Water is very important for life. However, some studies suggest that by 2025 more than half the people around the world will not have enough water.
Water is a fluid. Water is the only chemical substance on earth that exists naturally in three states. People know of over 40 anomalies about water. Unlike most other liquids such as alcohol or oil, when water freezes, it expands by about 9%. This expansion can cause pipes to break if the water inside them freezes.
Water is a molecule made of 2 hydrogenatoms and 1 oxygen atom. Its chemical formula is H2O. Like other liquids, water has a surface tension, so a little water can make drops on a surface, rather than always spreading out to wet the surface. Things having something to do with water may have "hydro" or "aqua" in their name, such as hydropower or aquarium, from the Greek and Latin names for water. It is also called the universal solvent, because it dissolves many things.
Uses of water[change | change source]
Plants and animals (including people) are mostly water inside, and must drink water to live. It gives a medium for chemical reactions to take place, and is the main part of blood. It keeps the body temperature the same by sweating from the skin. Water helps blood carry nutrients from the stomach to all parts of the body to keep the body alive. Water also helps the blood carry oxygen from the lungs to the body. Saliva, which helps animals and people digest food, is mostly water. Water helps make urine. Urine helps remove bad chemicals from the body. The human body is between 60% and 70% water.
Water is the main component of drinks like milk, juice, and wine. Each type of drink also has other things that add flavor or nutrients, things like sugar, fruit, and sometimes alcohol. Water that a person can drink is called "potable water" (or "drinking water"). The water in oceans is salt water, but lakes and rivers usually have unsalted water. Only about 3% of all the water on earth is fresh water. The rest is salt water.
Many places, including cities and deserts, don't have as much water as people want. They build aqueducts to bring water there.
Though people can survive a few months without food, they can only survive for a day or two without water. A few desert animals can get enough water from their food, but the others must drink.
Water is also used for recreational purposes, see list of water sports.
Related pages[change | change source]
References[change | change source]
|Wikimedia Commons has media related to Water.|
Other websites[change | change source]
Water is the most precious gift of nature. It has no taste, no smell and no colour. It is found everywhere and the other name of it is life. We find it in tanks, ponds, wells, rivers and springs. Almost three-fourth of the earth is water. We should conserve and save water so as to protect the water environment.
Benefits of Water
Without water nothing can live. Both animals and plants need water to live. It is the source of all life on earth.
We drink water, cook in water, bathe in water and wash in water. We use water to clean our clothes, utensils, floors, etc. The farmers need water for growing crops and plants. It is also used in generating hydro-electricity.
Why we should Save Water?
We should save water on account of following reasons:
- To ensure adequate supply of water for our future generation.
- Though a large quantity of water can be recycled, but it consumes large amount of power, energy and money.
- Clean water in lakes, oceans, rivers ensures healthy life of water animals.
- Millions of people around the world are still deprived of clean and safe drinking water.
How to Save Water?
- Stop the misuse of water.
- Manage the usage of water properly.
- Stop discharging pollutants without proper treatment.
- Take efforts in maintaining the quality of water.
- Stop wastage of water in our toilet.
- Promote rain-water harvesting and irrigation projects.
Last update: 03.08.2015
Category: Essays, Paragraphs and ArticlesTagged With: Water