Class 07 Social Science Air CBSE Questions & Answers

Class 7 · Social Science Air

This is Social Science class 07 Social Science Air CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Precipitation that comes down to the earth in liquid form is called
  • A
    Water vapour
  • B
    Rain
    Correct
  • C
    Cyclone
  • D
    Snow
2
Which of the following is false regarding atmosphere
  • A
    All living beings on this earth depend on the atmosphere for their survival.
  • B
    It provides us the air we breathe
  • C
    It is this mass of air that has made the temperature on the earth liveable
  • D
    Allow the harmful rays of the sun?s rays of the sun to reach earth
    Correct
3
Which of the following gas found in large quantity in atmosphere
  • A
    Carbon di oxide
  • B
    Nitrogen
    Correct
  • C
    Hydrogen
  • D
    Helium
4
Which gas needed by the plants for their survival
  • A
    Hydrogen
  • B
    Argon
  • C
    Nitrogen
    Correct
  • D
    Oxygen
5
How oxygen content remain constant in the air
  • A
    Humans and animals produce oxygen from the air as they breathe and green plants produce oxygen during photosynthesis
  • B
    Humans and animals take oxygen from the air as they breathe and green plants produce oxygen during photosynthesis
    Correct
  • C
    Humans and animals produce oxygen from the air as they breathe and green plants take oxygen during photosynthesis
  • D
    Humans and animals take oxygen from the air as they breathe and green plants take oxygen during photosynthesis
6
Which effect give rise in temperature causes the snow in coldest parts of the world to melt
  • A
    Growth Impact
  • B
    Growth effect
  • C
    Global warming
    Correct
  • D
    Global Impact
7
Who provide nitrogen to the plants
  • A
    Bacteria provide nitrogen
    Correct
  • B
    They directly taka from environment
  • C
    Air supply nitrogen directly to plants
  • D
    Human beings supply nitrogen
8
When air is heated, it _____ , becomes lighter and goes up
  • A
    Expands, lighter
    Correct
  • B
    Contracts, lighter
  • C
    Contracts, heavier
  • D
    Expands, heavier
9
When ___ air rises, ___ air from surrounding area rushes there to fill in the gap. That is how air circulation takes place
  • A
    Cold, Cold
  • B
    Hot, Hot
  • C
    Hot, Cold
    Correct
  • D
    Cold, Hot
10
Humans and animals take ___ from the air as they breathe
  • A
    Helium
  • B
    Hydrogen
  • C
    Argon
  • D
    Oxygen
    Correct
11
Air pressure is defined as
  • A
    The pressure exerted by the weight of air inside the earth?s surface
  • B
    The pressure exerted by the weight of air on the earth?s surface
    Correct
  • C
    The pressure exerted on the weight of soil by the earth?s surface
  • D
    The pressure exerted by the weight of soil on the earth?s surface
12
Green plants produce which gas during photosynthesis.
  • A
    Nitrogen
  • B
    Oxygen
    Correct
  • C
    Carbon di oxide
  • D
    Helium
13
In which layer the temperature rises very rapidly with increasing height
  • A
    Troposphere
  • B
    Thermosphere
    Correct
  • C
    Stratosphere
  • D
    Mesosphere
14
Monsoon in India is a type of
  • A
    Permanent wind
  • B
    Local wind
  • C
    Seasonal wind
    Correct
  • D
    Directional wind
15
This layer helps in radio transmission. In fact, radio waves transmitted from the earth are reflected back to the earth by this layer
  • A
    Stratosphere
  • B
    Troposphere
  • C
    Mesosphere
  • D
    Thermosphere
    Correct