9. Introduction to Water
• Water is the most common substance found on the earth. And it’s
symbol is H2O.
• About 3/4th of the Earth is covered with Water.
• It’s 70% of the body weight.
• 780 million people lack access to clean water.
• Most of the earth's surface water is permanently frozen or salty.
• Less than 1% of the water supply on earth can be used as drinking
water.
10. Three Forms of Water
Water is exist on Earth in it’s three different
States
Ice
Liquid
Water Vapor
Earth is the only planet that supports all these three
States of water- solid, liquid, gas.
11. When water is heated, it into steam changes or
water vapor. This vapor is a gas, which
can be changed into by cooling. When kept in
the ‘freezer’ of a refrigerator, water will change
into solid ice if you keep the ice in a warm place,
it will change into water
12. Sources of Water
Water is found in rivers, seas and lakes. It’s also stored underground
Ocean River Rain
16. Interesting Facts
• Water intoxication is most likely to occur during periods of
intense athletic performance.
• Pure water (solely hydrogen and oxygen atoms) has a neutral
pH of 7, which is neither acidic nor basic.
• USA uses about 346,000 million gallons of fresh water every
day.
• The overall amount of water on our planet has remained the
same for two billion years.
17. Water & Human being
The body uses water in many ways
• Water helps in making blood
• It keeps our body cool during summer by
making sweat
• It throws wastes from our body in the
form of urine.
• It quenches our thirst.
18. Water & Plants
Plants also depend on water in many
ways:
• Plant need water for their survival &
growth.
• They make their food with the help of
water, sunlight, carbondioxide and
green pigment (chlorophy) their leaves.
19. Every drop is precious !!!
Water conservation means to reduce
The use of water. This can be done by
finding the way to reuse the water.
20. Water Conservation
Way to save water
• Don’t let the water run while bathing,
washing, brushing teeth shaving etc.
• Use bucket instead of shower while
bathing.
• Collect water used to rising frits and
vegetables then reuse it to water
houseplants.
