Question

Define conduction, convection and radiation. In what way is conduction
(a) similar to convection?
(b) different from radiation?

Answer 1

Conduction is the process of transfer of heat from the hotter end of an object to its cooler end.
Convection is the process of transference of heat through a fluid (liquid or gas).
Radiation is the process of transfer of heat from one point to another point through radiation waves, which does not require any medium to propagate.

(a) Conduction is similar to convection as both the modes require a medium to transfer the heat.

(b)

Conduction	Radiation
It requires a medium to transfer heat.	It does not require any medium to transfer heat.