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Exosphere marks the beginning of the outer space.

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Important Questions on Air Around Us

EASY
Science>Chemistry>Air Around Us>Presence of Air Around Us
Which radiation coming from the sun, is prevented by the Ozone layer from falling on the earth’s surface?
MEDIUM
Science>Chemistry>Air Around Us>Presence of Air Around Us
 “A lot of indiscriminate activities of humans pollute the environment”- Support the statement by giving three examples in favour of it. Give examples of a national park and a biosphere reserve in West Bengal.
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Science>Chemistry>Air Around Us>Presence of Air Around Us
 What is the use of the ozone layer?
EASY
Science>Chemistry>Air Around Us>Presence of Air Around Us
 The atmosphere gets denser the higher you go.
HARD
Science>Chemistry>Air Around Us>Presence of Air Around Us
How will you show that an empty glass bottle is filled with air?
EASY
Science>Chemistry>Air Around Us>Presence of Air Around Us
What is the layer of air around the Earth called?
MEDIUM
Science>Chemistry>Air Around Us>Presence of Air Around Us
Explain why, when an empty glass bottle is inserted into a bucket of water vertically, water does not enter the bottle.
EASY
Science>Chemistry>Air Around Us>Presence of Air Around Us
_____ gets thinner with increase in altitude.
MEDIUM
Science>Chemistry>Air Around Us>Presence of Air Around Us
Write a note on the different layers of the atmosphere.
MEDIUM
Science>Chemistry>Air Around Us>Presence of Air Around Us
What is the atmosphere? Why is the atmosphere essential for life on earth? Why do mountaineers carry oxygen cylinders with them while climbing high mountains?
EASY
Science>Chemistry>Air Around Us>Presence of Air Around Us

Study the picture and answer the question:

Question Image

Figure A

What is Figure A? What is it used for?

MEDIUM
Science>Chemistry>Air Around Us>Presence of Air Around Us
State any five uses of air?
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Science>Chemistry>Air Around Us>Presence of Air Around Us
What is air? State the composition of air. Write any two properties of air?
EASY
Science>Chemistry>Air Around Us>Presence of Air Around Us
What name is given to the layer of air which surrounds the Earth?
MEDIUM
Science>Chemistry>Air Around Us>Presence of Air Around Us
Why do mountaineers and divers carry oxygen cylinders with them?
EASY
Science>Chemistry>Air Around Us>Presence of Air Around Us
The gas responsible for stopping ultraviolet rays is _____.
MEDIUM
Science>Chemistry>Air Around Us>Presence of Air Around Us
What is wind? State three uses of windmills.
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Science>Chemistry>Air Around Us>Presence of Air Around Us
Why does a lump of cotton wool shrink in water?
EASY
Science>Chemistry>Air Around Us>Presence of Air Around Us

Choose the right word and fill in the blank:

In a _____ (gale/breeze) the air moves gently. 

MEDIUM
Science>Chemistry>Air Around Us>Presence of Air Around Us
How is the atmosphere important to the Earth?