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
Presence of soluble salts in sea water makes it
  • A
    Polluted
  • B
    Foul smelling
  • C
    Saline
    Correct
  • D
    All of these
2
Water is the most common _______________.
  • A
    Solute
  • B
    Suspension
  • C
    Solvent
    Correct
  • D
    Solution
3
Wise use of natural resources is called
  • A
    Sustainable development
    Correct
  • B
    Judicious use
  • C
    Water cycle
  • D
    Water harvesting
4
The level of ground water in earth crest is called
  • A
    Water table
    Correct
  • B
    Water harvesting
  • C
    Water level
  • D
    Ground water
5
Circulation of water between earth surface and atmosphere is called
  • A
    Precipitation
  • B
    Water pumping
  • C
    Water cycle
    Correct
  • D
    Raining
6
Ground water contain about ___________ % water.
  • A
    90
  • B
    70
  • C
    80
  • D
    99
    Correct
7
Major reason for scarcity of water is
  • A
    Growing population
    Correct
  • B
    Industrial use
  • C
    Flood
  • D
    Agriculture
8
Addition of harmful substances in water leads to
  • A
    Drought
  • B
    Salinity
  • C
    Water pollution
    Correct
  • D
    Scarcity
9
In water works, chlorination is done to
  • A
    Kill the virus
  • B
    Remove the dust
  • C
    Add odor
  • D
    Kill the germs
    Correct
10
During sedimentation process, ___________ are removed.
  • A
    Bacteria
  • B
    Soil and insoluble substance
    Correct
  • C
    Plastics
  • D
    Stone and pesticides
11
Most liquids contracts on freezing but water
  • A
    Remain same on freezing
  • B
    Both contract and expand
  • C
    Expands on freezing
    Correct
  • D
    Contracts of freezing
12
Water is called unique solvent because
  • A
    It can dissolve almost all the material required by the body
    Correct
  • B
    All of these
  • C
    It is a colour less liquid
  • D
    It forms the 70% of our body
13
Collecting rain water and directing into ground is called
  • A
    Rain water irrigation
  • B
    Crop irrigation
  • C
    Water collecting
  • D
    Rain water harvesting
    Correct
14
Saline water can be converted into drinking water by
  • A
    Osmosis
  • B
    Reverse osmosis
    Correct
  • C
    Alternate osmosis
  • D
    Absorption
15
Drip irrigation is used to
  • A
    Irrigation in summer
  • B
    Cleaning the leaves
  • C
    Irrigation in winter
  • D
    Reduce the water loss
    Correct