Question

Which of the following is an example of radiation?

A. A metal spoon becomes warm after being set in a pot of boiling water.

B. Warm water rises because it is less dense than cool water.

C. Pancake batter cooks quickly after being spooned onto a hot griddle.

D. Our atmosphere is constantly being heated by the sun.

Answer 1

D. Our atmosphere is constantly being heated by the sun is an example of radiation.
A has to do with convection, B with density difference, C with conduction.
Radiation is a great problem because it is constantly destroying our ozone layer which protects us from Sun beams.

Answer 2

Answer: D. Our atmosphere is constantly being heated by the sun.

Radiation is the transmission of energy in the form of waves or particles released by one source and absorbed by another source. Types of radiations includes electromagnetic radiation, particle radiation, acoustic radiations and gravitational radiations.

Our atmosphere is constantly being heated by the sun is the example of the radiation because the sun radiates energy in all directions in the form of heat, light and radiations. Solar energy in the form of radiation is either reflected back to the sun or it is absorbed by the earth atmosphere. Therefore, this causes heating up of the earth atmosphere.