Air, Water & Weather Worksheet-7

Air, Water & Weather Worksheet-7

Multiple Choice Questions:

1. What is the process of adding chlorine tablets to water and making the water pure called?

(a) Chlorination         (b) Condensation      (c) Filtration

2. This is one of the method of purifying water in which all the insoluble impurities settle down. Identify the method.

 (a) Decantation        (b) Sedimentation     (c) Chlorination

3. Identify this method of purifying water in which the water is poured without disturbing the settled impurities.

 (a) Decantation        (b) Sedimentation     (c) Chlorination

4. Identify this method of purifying water in which  impurities are left behind on the filter paper and clean water is collected below.

 (a) Sedimentation    (b) Chlorination        (c) Filtration

5. We ______waste water.

(a) should                    (b) should not

6. We ______ keep drinking water covered.

(a) should                    (b) should not

7. We should _____ keep drinking water near bins and drains.

(a) always                   (b) never

8. We _____ clean the storage pots regularly before filling them with water.

(a) should                    (b) should not

9. We _____ clean the utensils regularly before filling them with water.

(a) should                    (b) should not

10. Tap water should be boiled before using it for ____ purpose.

(a) drinking                (b) cleaning                (c) bathing

11. For which purpose/s do we use water?

(a) Drinking                (b) Swimming            (c) Both

12. For which purpose/s is water very useful to us?

(a) Washing                (b) Cooking                 (c) Both

13. We should keep drinking water _____.

(a) covered                  (b) uncovered

Answer Key:

(1)-a; (2)-b; (3)-a; (4)-c; (5)-b; (6)-a; (7)-b; (8)-a; (9)-a; (10)-a; (11)-c; (12)-c; (13)-a