Match Column A with Column B. Column A Column B 1 . Nitrogen i. supporter of combustion 2 . Oxygen ii. significant impact on temperature 3 . Carbon dioxide iii. used in metallurgy 4 . Water vapour iv. used to fill air balloons 5 . Argon v. absorbs infrared radiation 6 . Helium vi. the main constituent of proteins

Nitrogen is the main constituent of protein s. It is the abundant gas in the atmosphere. Oxygen is the supporter of combustion. Fuel reacts with oxygen to release heat energy. Carbon dioxide is an important greenhouse gas. Carbon dioxide also absorbs and re-emits infrared radiation. Water vapour has a significant impact on temperature. It is the gaseous form of water. Argon is used in metallurgy. It is injected to stir the metal and help facilitate the refining steps. Helium is a gas and it occupies space. Helium gas is to fill air balloons . The grade 4 helium is known as the balloon grade helium. Column A Column B 1 . Nitrogen vi. the main constituent of proteins 2 . Oxygen i. supporter of combustion 3 . Carbon dioxide v. absorbs infrared radiation 4 . Water vapour ii. significant impact on temperature 5 . Argon iii. used in metallurgy 6 . Helium iv. used to fill air balloons

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Everyday Science CLASS 5.>Chapter 7 - Air>EXERCISES>Q 5

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Important Questions on Air

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5th CBSE

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Everyday Science CLASS 5.>Chapter 7 - Air>EXERCISES>Q 1

Match Column A with Column B.

Column A	Column B
$1$ . Nitrogen	i. supporter of combustion
$2$ . Oxygen	ii. significant impact on temperature
$3$ . Carbon dioxide	iii. used in metallurgy
$4$ . Water vapour	iv. used to fill air balloons
$5$ . Argon	v. absorbs infrared radiation
$6$ . Helium	vi. the main constituent of proteins