Question

7th A
SUB :- GEOGRAPH
DATE :
7/10/2020
AL NO.:- 5
Chapter 4 Air pressure
write short notes. ( search it from textbook)
Q
Pressure belt on the earth's surface.
1.
Ans​

Answer 1

Answer:

Air pressure varies with temperature. Air when heated expands and becomes less dense. Hot air being lighter rises or flows upwards. Hence it exerts lesser pressure. on the other hand air when cooled becomes dense and heavy. cold air sinks, or flows downwards. Henc, it exerts more pressure