Water Book Back Questions

6th Standard

    Reg.No. :
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Science

Time : 00:45:00 Hrs
Total Marks : 30
    5 x 1 = 5
  1. Around 97% of water available on earth_________ is water

    (a)

    fresh

    (b)

    pure

    (c)

    salty

    (d)

    polluted

  2. Which of the following is not a part of water cycle?

    (a)

    evaporation

    (b)

    condensation

    (c)

    rain

    (d)

    distillation

  3. Which of the following processes add water vapour to the atmosphere?
    i. Transpiration ii. Precipitation iii. Condensation iv. Evaporation

    (a)

    ii and iii

    (b)

    ii and iv

    (c)

    i and iv

    (d)

    i and ii

  4. About 30% of the fresh water is found in?

    (a)

    glaciers

    (b)

    ground water

    (c)

    other sources of water

    (d)

    0.3%

  5. Using R.O. plant at home eliminates lot of non-potable water. The best way to effectively use the expelled water of R.O. plant is_________.

    (a)

    make the expelled water go and seep near the bore well

    (b)

    use it for watering plants

    (c)

    to drink the expelled water after boiling and cooling

    (d)

    to use for cooking as the water is full of many nutrients

  6. 2 x 2 = 4
  7. Name the places where water is found as ice.

  8. What are the types of rain water harvesting?

  9. 2 x 3 = 6
  10. Give reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.

  11. The fresh water available on earth is only 3%. We cannot increase the amount of water. In that case, how can sustain the water level?

  12. 1 x 5 = 5
  13. What is potable water? List down its characteristics

  14. 1 x 10 = 10

  15. a. Identify the districts that get only low annual rainfall in Tamilnadu.
    b. Identify the districts that get a medium annual rainfall in Tamilnadu.
    c. State the districts that enjoy high annual rainfall in Tamilnadu

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