EWE/FS/WE/AW1
LEVEL: A: School: Primary
Water
What is water ?
Water covers about 70% of the earth’s surface.
About 1% of the water on earth is fresh
water and can be used for drinking, and
certain industrial processes.
Water can be in the following forms:
Liquid – the most important form for all the various uses of water, of
which drinking is the most important use.
Solid – water freezes at 0° Celsius and becomes ice which
is lighter than liquid water.
Gas – water vapour is present in the air. The amount of
vapour determines the degree of humidity. When water is
heated to 100° Celsius, the water is converted to vapour
and when the vapour cools down, steam is formed.
Water is a molecule (H20), which consists of three atoms - an oxygen
atom (O) and two hydrogen atoms (H).
Billions of water molecules form one
drop of water.
Useful links:
American Water Works Assoc.
www.ci.mesa.az.us
Related Fact Sheets: AW2
Contact: ewisa@wamsys.co.za URL: www.waterinfo.co.za
Prepared by: eWISA
Copyright: All right reserved
Sponsored by:
AW1