1. What is atmosphere?
2. Name 3 types of rainfall?
3. What is called weather?
4. Why do green plants use carbon di - oxide?
5. Name three types of winds?
Please mention question number
Answers
Answer:
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Page No 27:
Question 1:
Answer the following questions.
(i) What is atmosphere?
(ii) Which two gases make the bulk of the atmosphere?
(iii) Which gas creates greenhouse effect in the atmosphere?
(iv) What is weather?
(v) Name three types of rainfall?
(vi) What is air pressure?
ANSWER:
(i) The huge blanket of air surrounding the Earth is called atmosphere.
(ii) Nitrogen and oxygen make the bulk of the atmosphere.
(iii) Carbon dioxide creates greenhouse effect in the atmosphere.
(iv) Weather refers to the short-term changes in the atmosphere. It is the hour-to-hour, day-to-day condition of the atmosphere.
(v) Convectional rainfall, orographic rainfall and cyclonic rainfall are the three types of rainfall.
(vi) Air pressure is defined as the pressure exerted by the weight of air on the Earth’s surface.
Page No 27:
Question 2:
Tick the correct answer.
(i) Which of the following gases protects us from harmful sun rays?
(a) Carbon dioxide
(b) Nitrogen
(c) Ozone
(ii) The most important layer of the atmosphere is
(a) Troposphere
Explanation:
l) The mixture of gases that surrounds the earth or any star and other planets
- ))2)question convectional rainfall
- relief rainfall
- frontal rainfall