Match the column I with column II. Column I Column II (a) Weather cock (i) Gases and fine dust particles (b) Mountaineers (ii) Sailing yacht (c) Fine hair inside the nose (iii) Oxygen cylinders (d) Smoke (iv) Direction of air flow (e) Wind (v) Prevent dust particles

a. Weather cock shows the direction in which the air is moving at that place. It has two ends, one end is arrow-shaped and turns towards the wind and another end that is wider to catch the breeze. b. In high altitude, the amount of air is low, so the mountaineers carry the oxygen cylinders. c. Fine hair inside the nose filters the air and prevents dust particles from entering the respiratory tract. d. Smoke contains harmful gases such as carbon monoxide and other dust particles. e. Wind helps in the movement of sailing yacht. Wind is produced by the uneven heating of the earth's surface by the sun. Column I Column II (a) Weather cock (iv) Direction of air flow (b) Mountaineers (iii) Oxygen cylinders (c) Fine hair inside the nose (v) Prevent dust particles (d) Smoke (i) Gases and fine dust particles (e) Wind (ii) Sailing yacht

Match the Column I with Column II. Column I Column II (a) Nitrogen (i) 0 . 03 % (b) Oxygen (ii) Protective covering of earth (c) Carbon dioxide (iii) Occupies space (d) Atmosphere (iv) 78 . 1 % (e) Air (v) 20 . 9 %

a. Nitrogen is the major component of the air and composition of nitrogen in air is 78 . 1 % . b. Oxygen is the second major component of the air and its composition in air is 20 . 9 % . c. Carbon dioxide is the least component of air and its composition in air is 0 . 03 % . d. The ozone layer present in the atmosphere prevents the entry of harmful rays into the earth, therefore the atmosphere is known as the protective covering of the earth. e. Air is a mixture of gases and these gases have mass and occupies space. Column I Column II (a) Nitrogen (iv) 78 . 1 % (b) Oxygen (v) 20 . 9 % (c) Carbon dioxide (i) 0 . 03 % (d) Atmosphere (ii) Protective covering of earth (e) Air (iii) Occupies space

E M B I B E

All in One - Science>Chapter 15 - Air Around Us>Miscellaneous Questions>Q 26

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6th CBSE

IMPORTANT

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Nitrogen present in air supports the process of burning.

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Important Questions on Air Around Us

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6th CBSE

IMPORTANT

All in One - Science>Chapter 15 - Air Around Us>Miscellaneous Questions>Q 27

Atmosphere is essential for life on the earth.

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6th CBSE

IMPORTANT

All in One - Science>Chapter 15 - Air Around Us>Miscellaneous Questions>Q 28

Air is a mixture of many gases.

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6th CBSE

IMPORTANT

All in One - Science>Chapter 15 - Air Around Us>Miscellaneous Questions>Q 29

Green plants need carbon dioxide gas to make food.

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All in One - Science>Chapter 15 - Air Around Us>Miscellaneous Questions>Q 30

Respiration can occur only in the presence of nitrogen.

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All in One - Science>Chapter 15 - Air Around Us>Miscellaneous Questions>Q 31

Match the column I with column II.

Column I	Column II
(a) Weather cock	(i) Gases and fine dust particles
(b) Mountaineers	(ii) Sailing yacht
(c) Fine hair inside the nose	(iii) Oxygen cylinders
(d) Smoke	(iv) Direction of air flow
(e) Wind	(v) Prevent dust particles

HARD

6th CBSE

IMPORTANT

All in One - Science>Chapter 15 - Air Around Us>Miscellaneous Questions>Q 32

Match the Column I with Column II.

Column I	Column II
(a) Nitrogen	(i) $0.03 %$
(b) Oxygen	(ii) Protective covering of earth
(c) Carbon dioxide	(iii) Occupies space
(d) Atmosphere	(iv) $78.1 %$
(e) Air	(v) $20.9 %$