Olympiad – Class VII – Science - Che - Water - A Precious Resource

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Question - 1

Which of the following is a drinking water source?

  • A Sea water
  • B Glaciers
  • C Ground water
  • D Snow

Question - 2

Which of the following causes depletion in the water table of a place?

  • A Constructing factories and house
  • B Making concrete roads and floors
  • C Deforestation
  • D All of the above

Question - 3

What makes the earth appear blue from the outer space?

  • A The presence of forest
  • B The presence of sky
  • C The presence of water
  • D All of the above

Question - 4

What is the percentage of water in the human body?

  • A 80%
  • B 70%
  • C 60%
  • D 50%

Question - 5

What is water?

  • A A stable atom
  • B A stable element
  • C A stable mixture
  • D A stable compound

Question - 6

Why does ice float on water?

  • A Ice is heavier than water.
  • B Ice is cooler than water
  • C Ice is lighter than water.
  • D Ice is a liquid.

Question - 7

Which of the following statements is correct of the water table of a place?

  • A It changes from place to place.
  • B It changes from time to time
  • C It goes down when rains are less
  • D All of the above

Question - 8

Which property of water is used while washing clothes?

  • A Odour
  • B Colour
  • C Solubility
  • D Mass

Question - 9

Which of the following is NOT soluble in water?

  • A Salt
  • B Sugar
  • C Oxygen
  • D Sand

Question - 10

Why is sea water unfit for use in factories though it is available in plenty

  • A It contains bacteria
  • B It has foul smell
  • C It is heavier than tap water.
  • D It has salts which get deposited in the pipelines and boilers