Composition of Air

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Composition of Air: Overview

This topic covers concepts, such as, Water Vapour in Air, Condensation, Importance of Inhaling through Nostrils & Air pollution etc.

Important Questions on Composition of Air

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What is carbon dioxide?

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Which of the following is not a pollutant?

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The gas that does not involve in respiration of humans is_____.  

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Write two physical properties of nitrogen gas.

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The percentage of nitrogen in the air is_____.

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The major part of the air which does not support combustion is

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The main component of air is oxygen.

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If the given pie chart represents the composition of air, which part of the chart represents nitrogen, oxygen and other gases.
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Draw any two things that give out smoke. How do you think smoke make affect us?

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Fill in the blank to complete the words. Circle them in the word search.
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Air is needed to light a F_R_  

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Why your mother blows a pipe into the firewood stove to burn firewood.

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Place a lighted candle on the table-top as shown in the picture. Cover the lighted candle with a glass tumbler. Why is the candle flame put out?

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Place a lighted candle on the table-top as shown in the picture. Cover the lighted candle with a glass tumbler. What happens to the candle flame?

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Look at the picture. The firewood stove has ember but it is not burning. What trick does your mother use to burn the firewood?

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Do fuels burn on their own? 

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Which of these gases are the most responsible for the cause of air pollution?

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Name the gas used by green plants to prepare their food.

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The plants take in this gas to prepare food _____. 

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Organisms living in water use _____(oxygen/carbon dioxide) dissolved in water for respiration.

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Carbon dioxide turns lime water to _____(milky/curdy).