In these Worksheets for Science you will find questions related to the topic Air and the Atmosphere.
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| Worksheets for Science (Topic- Air and the atmosphere) |
Multiple Choice Questions
1The amount of oxygen present in the air is ______________.
(a) 20% (b) 30% (c) 21%
2.Living beings get a large amount of ______________ from leguminous plants.
(a) proteins (b) fats (c) carbohydrates
3.The rate of combustion is controlled by _______________.
(a) nitrogen (b) oxygen (c) helium
4._____________ nitrogen is used in the preservation of food.
(a) solid (b) liquid (c) gaseous
5.Human beings and animals release ____________ during respiration.
(a) oxygen (b) carbon dioxide (c) argon
6.Plants use water and ____________ in the process of photosynthesis.
(a) carbon dioxide (b) neon (b) xenon
7.________________ gas supports the process of combustion.
(a) oxygen (b) neon (b) both a and b
8.Water vapours are formed by this process. ____________.
(a) evaporation (b) boiling (c) both a and b
9.Asthma is caused by an increase in the amount of _____________.
(a) water vapours (b) dust particles (c) none
10.The dust particles keep the earth's atmosphere _____________.
(a) cool (b) hot (c) warm
Answers - 1.21% 2.proteins 3.nitrogen 4.liquid 5.carbon dioxide 6.carbon dioxide 7.oxygen 8.both a and b 9.dust particles 10.cool
Fill ups
1.The amount of nitrogen present in the air is ______________.
2.Air consists of gases, dust particles and _______________.
3.Peas and groundnuts are ______________ plants.
4.The nitrogenous bacteria convert nitrogen into _______________.
5.________________ helps in the growth of living beings.
6.________________ is used to extinguish fire.
7.Water vapours rise up to form ____________.
8.Excess dust particles may cause ____________ diseases
9._______________ gas is used in electricity bulbs.
10.Increased level of carbon dioxide may cause ______________.
Answers - 1.78% 2.water vapours 3.leguminous 4.nitrogenous compounds 5.proteins 6.carbon dioxide 7.clouds 8.respiratory 9.Argon 10.global warming
Write True if the statement is correct and False if the statement is incorrect.
1.Air is not a mixture of many gases.
2.Carbon dioxide is present in a very less amount as compared to nitrogen and oxygen.
3.The composition of air is same everywhere.
4.Nitrogen helps the plants to grow.
5.Nitrogen supports the process of combustion.
6Nitrogen is used in the preparation of fertilizers.
7.All aquatic animals breathe in dry oxygen.
8.Dust particles reflect back the sun's heat.
9.Inert gases are present in a large amount in the air.
10.Burning of fuels increase the level of carbon dioxide in the air.
Answers - 1.False 2.True 3.False 4.True 5.False 6.True 7.False 8.True 9.False 10.True
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