Question

1 Explain the activity to show that air expands on heating and contracts on cooling
2 Why does hot air rise upwards?
3 Name any four natural hazards.
Multiple Choice Question
4 Air exerts pressure in
a. all directions b. downward direction only.
c. upward direction only d. sideways only.

Answer 1

Answer:

1. when we heat air its kinetic energy increases because of which particles move fast and on cooling kinetic energy decrease due to which they collate at a place