in this about water

2. • All living things need water to survive. Can
you imagine living without water? What are
the activities you would not be able to do if
there is no water supply to your home. For
example:- we can not make our food , wash
clothes and utensils etc.

3. Oceans
97%
3%
Ice caps
and glaciers
2.997%
Ground
Water
0.003%

4. Have you ever felt weak and exhausted after a long time in the
hot sun? This because your body has lost a lot of its water
though sweat. Without the right amount of water in it, our
body would not be able to perform its functions. So the correct
water balance is vital for going through life’s activities. All living
things have a lot of water in their bodies. Almost 70% of human
body weight is due to water present in the tissues. Do you
know how much water is there inside a watermelon? Almost
95% of its weight!

5. 1. Agricultural needs: our country depends a lot on agricultural.
Farmers rely on water to sustain their agriculture crops, e.g.,
wheat, paddy, etc. many a times, rainfall is not sufficient to
water these crops, and farmers have to use artificial watering
systems, referred to as irrigation.

6. 2. Industrial needs: All factories use a large
amount of water every day – as raw material,
for cleaning, for heating, cooling and for their
electricity needs.

7. 3. personal/domestic needs : We need water
to drink, bathe, wash clothes and dishes, clean
our house and to water plants.

8. Apart from these uses, water is also used for
transportation and recreation. It also regulates the
climate of a place and provides homes to many
animals.

9. 1. It could be in the form of liquid. e.g., rain, river, sea.
2. It could be in the form of solid. e.g., ice, snow, hail.
3. It could be in the form of gas. e.g., water vapour.

10. define
• Evaporation:- The conversion of a liquid to its vapour is called
evaporation.
• Condensation:- The conversion of the vapour of a substance to
its liquid form is called condensation.
• Transpiration:- water vapour is also added into the air by the
leaves of plants, through the process of transpiration.

11. 1. Water vapour present in air.
2. Warm air along with water vapour rises in the atmosphere.
3. Water vapour condenses on dust particles to form tiny
droplets of water.
4. Several tiny water droplets come together to form a cloud

12. .
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Warm air 2
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Water droplet 3
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4

13. • Water droplets in the clouds keep bumping against one
another, and sometimes stick to from bigger drops. When
these become too heavy to float in the, they drop down back
to the Earth as rain. The water that comes down as rain, in
time, evaporates and goes up to form clouds again. This leads
to form a cycle, known as the water cycle.
• Water cycle is the cyclic movement of water from the
atmosphere to the Earth and to the atmosphere though
various processes.

14. • Drought is an abnormally long period of insufficient or no
rainfall. During drought, rivers run dry. The water level in lakes
goes down, and even the water in the soil gets dried up. A
drought often leads to a lake of food in the region, causing a
famine.

15. • Too much rain leads to water being everywhere. Sometimes
the entire area remains submerged under water. This condition
is called flood. A flood can lead to disease, starvation and even
the loss of homes and lives.

16. Conservation of water
• A dam is answer to both drought and flood. It is a
structure built to hold back water in order to prevent
flooding, and to provide water for irrigation and storage.

18. 1. Inform the municipality or call a plumber if you spot any
leaking pipes in your neighborhoods.
2. Take water in a bucket for your bath instead of using the
shower. Remember to shut the tap tight after each use.
3. Do not leave a tap running while brushing your teeth.

19. 4. Instead using running water for washing utensils, soak them
first in one tub and wash them in another, using a thin trickle
only to rinse off.
5. Try not to though away used or extra water down the drain if it
can be used for some other purpose.
6. Repair all leaky pipes and tap.
7. Water plants and grass early in the morning. Watering by hand
saves a lot of water as against using a hose.

20. • The process of collecting and storing
rainwater from roofs or a surface catchment
is called rainwater harvesting.

21. • Anther method of conservation of water is to safeguard our
fresh water from pollution. Garbage and harmful chemicals
pollute the water and make it unfit for use. Polluted water is
also very bad for aquatic life. Plants and animals in and around
polluted water may die or get infected. And when humans
consume the contaminated fish, etc., they are also put at risk
of diseases.