What is water

It is vital for all known forms of life, even though it provides no calories or organic nutrients. It is one of the most plentiful and essential of compounds. A tasteless and odourless liquid at room temperature, it has the important ability to dissolve many other substances.

Water freezes at 0°C (32°F) and boils at 100°C (212°F). Chemical formula: H O.

Each molecule is made of one oxygen and two hydrogen atoms held together by strong covalent bonds. Water is made up of billions of molecules. The form water takes depends on the temperature. Your body is made up of many bones.

All these bones make up your skeleton. Many of these water molecules make up the water you see in this glass. It is essential to all living things, plant and animal.

We drink it, we wash with it, we play in it and we cook in it.

Water : WHO health topic page on water provides links to descriptions of activities, reports, publications, statistics, news, multimedia and events, as well as contacts and cooperating partners in the various WHO programmes and offices working on this topic. The chemical formula is hydrogen oxide (H2O). It appears colorless to the naked eye in small quantities,. 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 ). Only about of all the water on earth is fresh water. All known forms of life need water. Through evaporation, precipitation and runoff, water is continuously flowing from one form to another, in what is called the water cycle. Everything is made of atoms.

An atom is the smallest particle of an element, like oxygen or hydrogen. Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. A single drop of water contains billions of water molecules.

Water turns into a gas through a process called evaporation. The water on your body changes to a gas called water vapor. Heat makes water evaporate faster.

All air has some water vapor. Tropical rain forests and deserts are both hot. One is drier than the other. Water hardness varies throughout the United States.

Additionally, water pollution may consist of chemicals introduced into the water bodies as a result of various human activities.