Q1 of 8 Page 72

Can you imagine what will happen to us in the absence of ozone in the atmosphere?

Ozone layer prevents the ultraviolet rays from reaching the Earth. In absence of the ozone layer the rays will reach to us and damage our skin causing skin cancer and other deadly diseases.


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1

Multiple choice question.

Oxygen gas is in negligible quantity at the height of atmosphere:


 1

Multiple choice question.

Which one of the following gases is transparent to incoming solar radiation and opaque to outgoing terrestrial radiation?


 2

Answer the following questions in about 30 words.

(i) What do you understand by atmosphere?


(ii) What are the elements of weather and climate?


(iii) Describe the composition of atmosphere.


(iv) Why is troposphere the most important of all the layers of the atmosphere?


 3

Answer the following questions in about 150 words.

(i) Describe the composition of the atmosphere.


(ii) Draw a suitable diagram for the structure of the atmosphere and label it and describe it.