Question

Question 1
The atmosphere of the earth is heated by radiations which are mainly:

(a) radiated by the sun
(b) re-radiated by land
(c) re-radiated by water
(d) re-radiated by land and water

Answer 1

(d) re-radiated by land and water

When solar radiations fall on earth, some are absorbed by the land but the majority of these are reflected back or re-radiated by land and water bodies. These re-radiated or reflected solar radiations heat up the atmosphere. This results in convection currents.