Name the following.
(a) Constituents of the biosphere
(b) Biotic constituents of soil
(c) Fossil fuel
(d) Inert gases in air
(e) Gases that are harmful to the ozone layer

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Solution

(a) Constituents of the biosphere- hydrosphere and atmosphere
(b) Biotic constituents of soil- microorganisms and insects
(c) Fossil fuel- coal and petroleum
(d) Inert gases in air- oxygen and nitrogen
(e) Gases that are harmful to the ozone layer- carbon tetrachloride

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Question 2

(a) The constituent of the air that contains harmful gases and dust particles is known as _______.

(b) Shortness of breath and intense cough is mainly caused to the inhalation of ______ (polluted air / fresh air).

Fill in the following blanks with suitable words :

(a) Fossil fuels are ___ , ___ and ___ .

(b) Coal contains mainly ___ .

(d) The process of separation of different constituents from petroleum is called ___ .

(e) The least polluting fuel for vehicles is ___ .

(f) The burning of fossil fuels causes air ___ and also leads to global ___ .

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