MCQ Questions for Class 6 Science: Ch 14 Water

MCQ Questions for Class 6 Science: Ch 14 Water

1. Dew is the
(a) Melting of ice on mountain peaks
(b) Freezing of water in river and ponds
(c) Condensation of water vapour in atmosphere
(d) Condensation of water vapour near the earth surface
► (d) Condensation of water vapour near the earth surface

2. During transpiration, plants lose water in form of
(a) Liquid water
(b) Water vapour
(c) Ice water
(d) Cold water
► (b) Water vapour

3. Envelop of air around the earth is called
(a) Atmosphere
(b) Food chain
(c) Biosphere
(d) Ecosystem
► (a) Atmosphere

4. An example of underground water is
(a) River
(b) Well
(c) Sea
(d) Lake
► (b) Well

5. The process of changing water vapour into water is called
(a) Condensation
(b) Sedimentation
(c) Evaporation
(d) Boiling
► (a) Condensation

6. Which one is a renewable natural source?
(a) Water
(b) Coal
(c) Forest
(d) Petrol
► (a) Water

7. Gaseous state of water is
(a) Ice
(b) Cloud
(c) Vapour
(d) Rain
► (c) Vapour

8. Loss of water by plants is called
(a) Transpiration
(b) Transportation
(c) Evaporation
(d) Condensation
► (a) Transpiration

9. Of the total amount of water present on the earth, the water available for human use is about
(a) 20%
(b) 2%
(c) 1%
(d) 10%
► (c) 1%

10. Evaporation of water takes place faster in
(a) Temperate condition
(b) Humid condition
(c) Hot condition
(d) Cold condition
► (c) Hot condition

11. The purest form of water is
(a) Rain water
(b) Subsoil water
(c) Spring water
(d) Hand pump water
► (a) Rain water

12. No rain or very less rain causes
(a) Soil fertile
(b) Soil infertile
(c) Flood
(d) Drought
► (d) Drought

13. Cloud seeding is a technique that induces rain. What does the process involve?
(a) Adopting an agricultural practice that depends on clouds
(b) Introducing particles in clouds to facilitate condensation
(c) Making clouds and placing them in the sky
(d) Scattering clouds to form seed like structures
► (b) Introducing particles in clouds to facilitate condensation

14. Why do you feel cool after you start sweating?
(a) Evaporation of water droplets
(b) Condensation of water droplets
(c) Freezing of water droplets
(d) Solidification of salts in the water droplets
► (a) Evaporation of water droplets

15. Why is water scarcity increasing day by day?
(a) Water cycle has stopped functioning.
(b) The total amount of water on earth has decreased.
(c) The consumption of water has increased.
(d) There is an increasing frequency of floods.
► (c) The consumption of water has increased.

16. What is the main source of water for inland lakes?
(a) Snow
(b) Sea water
(c) Ground water
(d) Springs
► (c) Ground water

17. Which of the following is potable water?
(a) A glass of water fit for drinking
(b) Water in a pot
(c) Sea water
(d) Water with bacteria and chemicals
► (a) A glass of water fit for drinking

18. Water is a/an
(a) Solution
(b) Element
(c) Compound
(d) Mixture
► (c) Compound

19. The falling of water drops of clouds is known as
(a) Snow hail
(b) Freezing
(c) Condensation
(d) Precipitation
► (d) Precipitation

20. Rain is also known as
(a) Condensation
(b) Transpiration
(c) Precipitation
(d) Evaporation
► (c) Precipitation

21. Clouds are formed due to
(a) only evaporation.
(b) only condensation.
(c) both evaporation and condensation.
(d) only vaporization.
► (c) both evaporation and condensation.

22. Excessive rain cause
(a) Flood
(b) Disease
(c) Drought
(d) Deforestation
► (a) Flood

24. Water is ___________ for life.
(a) Needed in small
(b) Not necessary
(c) Essential
(d) Non-essential
► (c) Essential

25. In early winter mornings, we can see drops of water on the grass. This is because of
(a) photosynthesis.
(b) transpiration.
(c) condensation.
(d) water cycle.
► (c) condensation.

26. What causes the formation of salt from sea water?
(a) Evaporation
(b) Condensation
(c) Transpiration
(d) Transformation
► (a) Evaporation

27. Rain water harvesting is a method employed to
(a) stop soil erosion in a place.
(b) raise the water table of a place.
(c) decrease drought at a place.
(d) decrease floods at a place.
► (b) raise the water table of a place.

28. In a small town, the number of water pumps, concrete houses and roads increased. What happens to the water table of that place?
(a) It becomes lower
(b) It becomes higher
(c) It remains unaffected
(d) It first becomes lower and then higher.
► (a) It becomes lower
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