CBSE-IX-Science
09: 2-Natural Resources
- #1Why is the atmosphere essential for life?Ans : We need atmosphere for following reasons:
- (i) It works like a blanket and traps the radiations reflected back from earth surface that keeps the average temperature of earth of quite steady and suitable for sustenance of life.
(ii) It provides carbon dioxide for photosynthesis and oxygen for respiration and combustion.
(iii) Prevents sudden change in temperature.
(iv) Enables us to hear sounds.