Class 6 Air Around Us CBSE Questions & Answers

Class 6 · Air Around Us

This is Science Class 6 Air around Us CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Winnowing is used to separate
  • A
    Seeds from fruits
  • B
    Sand from rice
  • C
    Grain form husk
    Correct
  • D
    Iron form other metals
2
The layer of air around the earth surface is called
  • A
    Stratosphere
  • B
    Hydrosphere
  • C
    Atmosphere
    Correct
  • D
    Lithosphere
3
Name the object which is inflated by air
  • A
    Buckets
  • B
    Balloons
    Correct
  • C
    Chair
  • D
    Table
4
Density of air ____________ with height.
  • A
    Remain same
  • B
    Decrease
    Correct
  • C
    Fist increase than decrease
  • D
    Increase
5
Gases and fine dust particle together make the
  • A
    Smoke
    Correct
  • B
    Water vapour
  • C
    Carbon dioxide
  • D
    Carbon monoxide
6
Oxygen is used in hospitals for
  • A
    Burning wastage
  • B
    Fermentation
  • C
    Artificial respiration
    Correct
  • D
    Decomposition
7
Atmospheric pressure _____________ with height.
  • A
    Decrease
    Correct
  • B
    Depends upon season
  • C
    Increase
  • D
    Remain same
8
An empty glass is in fact
  • A
    Not empty
    Correct
  • B
    Filled with water vapour
  • C
    Filled with oxygen
  • D
    Empty
9
The balance between carbon dioxide and oxygen is maintained by
  • A
    Transpiration and respiration
  • B
    Hydrogenation and combustion
  • C
    Photosynthesis and respiration
    Correct
  • D
    Evaporation and photosynthesis
10
All animals including human exhale
  • A
    Water vapour
  • B
    Carbon dioxide
    Correct
  • C
    Nitrogen
  • D
    Oxygen
11
Which of the following gas is found in largest quantity in air?
  • A
    Oxygen
  • B
    Argon
  • C
    Nitrogen
    Correct
  • D
    Carbon dioxide
12
During rain, soil animals comes out from their burrows for
  • A
    Respiration
    Correct
  • B
    Regeneration
  • C
    Decomposition
  • D
    Nutrition
13
Animals living in water have ____________ for respiration.
  • A
    Skin
  • B
    Spiracles
  • C
    Lungs
  • D
    Gills
    Correct
14
In which of the following air is not used?
  • A
    Filling balloon
  • B
    Inflating tyres
  • C
    Winnowing
  • D
    Boiling water
    Correct
15
The components of air which are harmful to living beings are
  • A
    Dust and water vapour
  • B
    Dust and smoke
    Correct
  • C
    Nitrogen and carbon dioxide
  • D
    Smoke and water vapour