Match the Columns Column A Column B (a) Water vapours (i) Photosynthesis (b) Carbon dioxide (ii) Moving air (c) Nitrogen (iii) Supports combustion (d) Envelope of air (iv) Gaseous form of water (e) Oxygen (v) Atmosphere (f) Wind (vi) Helps in making proteins by plants

(a) Water vapours (iv) Gaseous form of water Gaseous form of water is called water vapours. Water is converted into its gaseous state when it is heated. (b) Carbon dioxide (i) Photosynthesis Plants use carbon dioxide during photosynthesis and produce sugar and oxygen. (c) Nitrogen (vi) Helps in making proteins by plants Nitrogen present in the air brought down to the soil with the help of rain in the form of nitric acid. Microorganisms present in the soil convert nitric acid into nitrate compounds and this is used by the plants. (d) Envelope of air (v) Atmosphere The envelope of air is called atmosphere. It is extended up to 1600km from the surface of the earth. (e) Oxygen (iii) Supports combustion Oxygen present in the air supports combustion. Fast-moving air is called wind. Column A Column B (a) Water vapours (iv) Gaseous form of water (b) Carbon dioxide (i) Photosynthesis (c) Nitrogen (vi) Helps in making proteins by plants (d) Envelope of air (v) Atmosphere (e) Oxygen (iii) Supports combustion (f) Wind (ii) Moving air

E M B I B E

CANDID New Trends in SCIENCE 6>Chapter 15 - Air Around Us>TEST YOUR KNOWLEDGE>Q A

EASY

6th CBSE

IMPORTANT

Earn 100

Why do plants need carbon dioxide?

Important Questions on Air Around Us

EASY

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 15 - Air Around Us>TEST YOUR KNOWLEDGE>Q A

What kind of rays produced by the sun are harmful?

EASY

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 15 - Air Around Us>TEST YOUR KNOWLEDGE>Q A

Which is the most essential component of air for sustenance of life?

EASY

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 15 - Air Around Us>TEST YOUR KNOWLEDGE>Q B

_____ gas supports the burning of fuels.

EASY

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 15 - Air Around Us>TEST YOUR KNOWLEDGE>Q B

_____ (Air/wood) is transparent and has no colour.

EASY

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 15 - Air Around Us>TEST YOUR KNOWLEDGE>Q B

The percentage of _____ present in air is

78 %

of volume.

EASY

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 15 - Air Around Us>TEST YOUR KNOWLEDGE>Q B

Air is not a single substance but a mixture of _____.(solids / gases)

EASY

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 15 - Air Around Us>TEST YOUR KNOWLEDGE>Q C

Match the Columns

Column A		Column B
(a)	Water vapours	(i)	Photosynthesis
(b)	Carbon dioxide	(ii)	Moving air
(c)	Nitrogen	(iii)	Supports combustion
(d)	Envelope of air	(iv)	Gaseous form of water
(e)	Oxygen	(v)	Atmosphere
(f)	Wind	(vi)	Helps in making proteins by plants