Page 89 - ICSE Chemistry 6

Take a Break!

Answer in one word/a few words.
1. The liquid that dissolves a solute _______________
2. Substances that do not dissolve in water _______________
3. A solu on which cannot dissolve any more of the solute _______________

4. Water which is fi t for consump on _______________
5. A state of frequent, loose or liquid stools _______________
6. The par culate impuri es le behind on a fi lter paper during fi ltra on _______________

IMPORTANCE OF WATER FOR SUSTENANCE OF LIFE ON EARTH

Water is vital for sustenance of life on the earth. It circulates through the land the way it circulates through
the human body. It is needed for func ons such as transpor ng, dissolving and replenishing nutrients and
organic ma er, and carrying away the waste materials. In human body, it plays a major role in regula ng
the ac vi es of fl uids, cells, ssues, blood, lymph and granular secre ons. Water is also required for
various other human, agricultural and industrial ac vi es.

Need to Conserve Water Know Your Scientist
Industrializa on, popula on growth and Rajindra Singh (born in 1959) is a
agricultural ac vi es have led to an increase well-known water conserva onist.
in the demand of water. Excessive use of He is known as the ‘Waterman of
water has led to decline in the water level. India’. His NGO helps villagers to take
Hence, conserva on of water is important. charge over water management.

Steps to Conserve Water

Water is a precious natural resource. We should follow the given measures to conserve water.
• Taps should not be le running while brushing teeth, bathing or washing clothes.
• Farmers should use be er methods of irriga on like drip irriga on (in which water is supplied to
plants drop by drop) to save water.
• Dams and reservoirs should be constructed to collect water and control fl oods.
• Water in industries should be recycled and reused to the maximum possible extent.
• Trees should be planted as they help in causing rainfall.
• Rainwater harves ng should be prac sed. It is done by
allowing rainwater falling on roofs of buildings to fl ow
into a deep trench in the ground.
We should emphasise on collec ng the rainwater in
drinking
drums and buckets also. The water collected is just rich water inlet pump washing garden
in salt and not really dirty. So, it can be used for mopping fi lter machine toilet watering
the fl oor, watering plants and washing clothes. outfl ow
• Leaking taps and pipes should be repaired at the earliest. rainwater
tank
• Polluted water should be treated and recycled, and put
to use for purposes such as irriga on. Fig. 4.11: Rainwater harvesting and its uses

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