what are the things the same and differnt about heat transfer. (radiation and convection?

Answer 1

The only things similar with convection and radiation is they are both methods of heat transfer. Radiation is heat given off in the form of electromagnetic waves. Put your hand near a lightbulb - the heat you feel is from radiation (mostly in the infra-red spectrum). Convection is heat transfer caused by a fluid moving around another object. When you blow on a french fry to cool it down, you are using convection. The air you blow draws heat from the fry by moving past it.

Answer 2

Both radiation and convection are capable of moving heat across a distance without a solid structure through which to carry the heat, but convection requires the use of a fluid to carry the heat. Convection uses the energy stored in the mass of the fluid, but radiation carries the heat using subatomic EM particles.

Answer 3

radiation - transfer of heat through "waves" (how the sun heats your body outside)

convection - transfer of heat through a liquid in a cycle (like when water boils, the heat moves in a circle)

conduction - transfer of heat when atoms touch each other... (when your feet warm up as you walk on the black pavement