Class 7 Water A Precious Resource CBSE Questions & Answers

Class 7 · Water A Precious Resource

This is Science Class 7 Water A Precious Resource CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which one of the following is not responsible for shortage of water?
  • A
    Increasing population
  • B
    Mismanagements of water
  • C
    Increasing industries
  • D
    Heavy rainfall
    Correct
2
“Every Drop Counts” is a slogan related to
  • A
    importance of counting
  • B
    Counting of water drops.
  • C
    counting of drop of any liquid
  • D
    importance of water
    Correct
3
In which step of water cycle heat loss do not takes place?
  • A
    Transpiration
  • B
    Condensation
  • C
    Translocation
  • D
    Evaporation
    Correct
4
Ultimate source of water is
  • A
    River
  • B
    Rain
    Correct
  • C
    Lakes
  • D
    Ponds
5
Water shortage is a problem faced by
  • A
    People living in all localities
    Correct
  • B
    People living in rural area only
  • C
    People living in cities only
  • D
    People living in metro only
6
In horticulture and agriculture, loss of water can be minimize by using
  • A
    Deep irrigation
  • B
    Drip irrigation
    Correct
  • C
    Channel irrigation
  • D
    Canal irrigation
7
The total water
  • A
    Of ponds and rivers of the world remain constant
  • B
    Sea and ocean remain constant
  • C
    Of the world remain constant
    Correct
  • D
    Under the ground remain constant
8
Green house effect causes
  • A
    Shortage of water
  • B
    Excessive rain
  • C
    Global warming
    Correct
  • D
    Less rain
9
Water molecules consists of
  • A
    Two atoms of oxygen and one atom of nitrogen
  • B
    Two atoms of hydrogen and one atom of oxygen
    Correct
  • C
    Two atoms of nitrogen and one atom of hydrogen
  • D
    Two atoms of oxygen and one atom of hydrogen
10
Which type of floor does not allow water seepage into soil easily?
  • A
    Earthen floor
  • B
    Agricultural land
  • C
    Horticultural land
  • D
    Pukka floor
    Correct
11
Ice floats on water surface because
  • A
    Ice is lighter than water
  • B
    Ice has more density than water
  • C
    Water is lighter than ice
  • D
    Ice has less density than water
    Correct
12
Water is used a coolant in motor vehicles because
  • A
    It has high heat absorbing capacity
    Correct
  • B
    It has less heat absorbing capacity
  • C
    It is free of cost
  • D
    It is easily available
13
Most liquids contracts on freezing but water
  • A
    Both contract and expands
  • B
    Expands on freezing
    Correct
  • C
    Remain same on freezing
  • D
    Contracts of freezing
14
Global warming causes
  • A
    Transpiration of water
  • B
    Melting of ice on poles and mountain caps
    Correct
  • C
    Condensation of water in atmosphere
  • D
    Evaporation of water
15
Which two metal ions make the water hard?
  • A
    Calcium and Potassium
  • B
    Calcium and Magnesium
    Correct
  • C
    Sodium and Calcium
  • D
    Magnesium and Sodium