Water is a life-supporting compound which is tasteless, odourless, completely transparent. It is vital for all known forms of life on planet Earth. In fact, Water one of main reasons why our planet Earth supports life. Chemically, Water is represented as H₂O, that is 2 molecules of Hydrogen and 1 molecules of Oxygen. Water covers 71% of the Earth's surface, mostly in seas and oceans.

Water is a vital component of Earth's hydrosphere, and the study of Water is called Hydrology.

Other than supporting life, Water and different forms of water is responsible for many water sports like swimming, boat racing, surfing, diving, ice skating, skiing etc.

World Water Day: 22 March (UN Observance day)

Phobia of water is called Aquaphobia. It is an irrational fear or uncomfortable anxiety caused due to water.

Melting point: 0 °C

Boiling point: 100 °C

Types of Water

Surface Water

Water above ground in streams, rivers, lakes, reservoirs, surface canals etc.

Ground Water

Groundwater is the water found underground in the cracks, spaces in soil, pores and cracks in rock etc.

Potable Water / Drinking Water

Water that is completely safe to drink and to use for food preparation. It is highly scarce form of water on Earth, due to reckless water pollution and injudicious use of potable water by humans.

Distilled Water

Water that has been boiled into vapour and condensed back into liquid, through the process called distillation. Distillation of water remove unwanted substances and impurities from the water. It is a type of potable water.

Carbonated Water

Water that is infused with carbon dioxide is called Carbonated water through pressure. Soft drinks and soda are the examples of carbonated water. Carbonated water produces small bubbles, hence also called fizzy water and sparkled water.

Types of Water bodies

A waterbody is the apparent accumulation of water on the Earth’s surface.

Type of water bodies: Ocean, Seas, Lakes, Rivers, Pond, Inlet, Reservoir, Fjord, Estuary, Bay, Cove, Lagoon etc. Some of them are explained below.


Oceans are gigantic water bodies of saltwater surrounding a continent(s). They are largest water bodies present. Ocean act as abode or final unify destination fro rivers and water streams. Ocean is salt water source.


Same as oceans, but relatively smaller than size.


It is a flowing water body that either unify with other river or ends up in a sea or an ocean. Rivers are either fed by glaciers or rainfall.


A stagnant or still-standing water body. Lake can be natural or man made.


Same as lake, but relatively much smaller in size.


A lake or pond created using a dam or lock to water.

Forms of Water




Water Vapour

Importance of Water

  • cooking
  • washing their bodies
  • washing clothes
  • washing cooking and eating utensils; such as billies, saucepans, crockery and cutlery
  • keeping houses and communities clean
  • recreation; such as swimming pools
  • keeping plants alive in gardens and parks
  • Water carries nutrients to all cells in our body and oxygen to our brain
  • Water allows the body to absorb and assimilate minerals, vitamins, amino acids, glucose and other substances
  • Water flushes out toxins and waste
  • Water helps to regulate body temperature
  • Water acts as a lubricant for joints and muscles
  • It helps excrete waste through perspiration, urination, and defecation
  • It aids in digestion and It helps with nutrient absorption

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Curated by: Aakash Gautam