Page 99 - ICSE Chemistry 6

Review Your Learning

A. Answer in one word.
1. A source of water that replenishes other sources of water _________________
2. The level of water under the ground _________________
3. Con nuous circula on of water from the earth to the atmosphere and
back again _________________
4. Electricity generated using water stored in dams _________________

5. A uniform mixture of the solute and the solvent _________________

B. State whether the given statements are true (T) or false (F).
1. Rainwater gets polluted while falling down.
2. Groundwater contains suspended impuri es.
3. Diges on of food in the stomach takes place with the help of water.
4. Typhoid is a waterborne disease caused by virus.

5. Trees should be planted as they help in causing rainfall.
6. Flood causes soil erosion.

C. Match the columns.
Column A Column B
1. Surface water (a) Bacterium
2. Groundwater (b) Purifi ca on of water
3. Jaundice (c) Handpumps, tube wells or bore wells
4. Cholera (d) Hepa s A virus

5. Chlorina on (e) Oceans and seas

D. Explain the following terms.
1. Well water 2. Aera on 3. Dis lla on 4. Flood 5. Drought
E. Answer the following questions.

1. Write a note on the occurrence of water.
2. List the ways in which water is important for humans.
3. Explain the factors on which the forma on of a solu on depends.

4. With the help of an ac vity, show that the solubility of a solute increases on increasing the temperature.
5. What can happen on consuming polluted water?
6. Why is it important to conserve water? What steps should be taken to conserve water?

PROJECT
Create a presenta on on the topic ‘Eff ects of Water Pollu on on Environment’. Find the related informa on
and images using the Internet. Add audio and visual eff ects to your presenta on. Format it as per your
choice.

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