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प्रश्न
Why is the atmosphere essential for life?
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उत्तर
The atmosphere is essential for life because it maintains an appropriate climate for the sustenance of life by carrying out the following activities:-
(i) Atmosphere keeps the average temperature of the Earth fairly constant during day time.
(ii) It prevents a sudden increase in temperature during day time.
(iii) It also slows down the escape of heat from the surface of the Earth into outer space during night time.
(iv) It contains all the important gases which are required for sustaining life on earth.
These gases are :-
(a) Oxygen for respiration of living organisms and oxidation.
(b) Carbon dioxide for photosynthesis in plants and for making food.
(c) Nitrogen for providing inert atmosphere and making proteins.
(iv) The stratosphere region (16-23 km from the surface of Earth) of atmosphere contains a thick layer of ozone which filters the harmful UV radiation from Sun. If these radiations reach on the surface of Earth, then they may cause cancer in animals and are also harmful for plants.
संबंधित प्रश्न
Give one use for the following inert gase :
krypton
Name the products formed when a candle burns in air.
How does oxygen and carbon dioxide remain nearly constant in the atmosphere?
State its role in warming the earth’s environment and in excess resulting in global warming.
State the utility of –
(a) Water vapour
(b) Rare or inert gases present in the air.
Give the environment effect of three polluting gases with a reason why nitrogen is not considered a polluting gas.
______ gas is filled in tyres of vehicles.
What is moving air called?
Name two example for wind instruments.
How do we get cool water from a clay water pot on hot sunny days?
