Air Around Us [CBSE (Central Board of Secondary Education) Class-6 Science]: Questions 1 - 6 of 19

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Question 1

Question MCQ▾

Sources of dust particles present in the air are:

Choices

Choice (4)Response

a.

Construction activities and agricultural practices

AND

Blowing of wind

b.

Traffic on the road

c.

Dusting at home, earth moving operations

d.

All a., b. and c. are correct

Edit

Question 2

Question MCQ▾

A lump of cotton wool shrink when put in water:

Choices

Choice (4)Response

a.

Because it is light in weight

b.

Because it contains a lot of air in large spaces between its fibres

c.

Because it is white in colour

d.

All of the above

Edit

Question 3

Question MCQ▾

The gas which helps to keep the earth warm is:

Choices

Choice (4)Response

a.

Oxygen

b.

Nitrogen

c.

Carbon-dioxide

d.

None of the above

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Question 4

Question MCQ▾

Aquatic animals and aquatic plants takes oxygen from air dissolved in:

Choices

Choice (4)Response

a.

Water

b.

Salt

c.

Question does not provide sufficient data or is vague

d.

All of the above

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Question 5

Question MCQ▾

Uses of air are:

Choices

Choice (4)Response

a.

Compressed air is used to fill tyres

AND

Dispersal of seeds and pollen

b.

For burning fuels

c.

Used by human beings for breathing

d.

All a., b. and c. are correct

Edit

Question 6

Question MCQ▾

The amount of water vapour present in the air is known as:

Choices

Choice (4)Response

a.

Transpiration

b.

Evaporation

c.

Humidity

d.

Moisture

Edit