Question

Differentiate between conduction and convection.

Answer 1

Instructions:

• Give definitions of conduction and convection.
• Explain how conduction and convection work in the earth’s atmosphere.

Solution:

Conduction Conduction process is the mechanism of heat transfer between two adjacent parts of a body due to their temperature difference.	Convection Convection process is the mode of heat transfer by the motion of matter which takes place only in fluids.
The air at very low altitude comes in direct contact with the earth’s surface and gets heated through the conduction process.	The heated air near the earth’s surface expands and rises up into the atmosphere. While the colder air from the atmosphere sinks down near the earth’s surface to get heated and rise.
	As they rise, the cold air from the atmosphere once again sinks down to get heated and rise again. This process continues in a cyclic motion.