What is the difference between touching the metal walls of an oven and just exposing your hand to the oven's hot air?
a. The metal has high temperature but the air is cooler, so you burn when you touch the metal.
b. Your hands are closer to the metal molecules than to the air molecules.
c. The air is a poor conductor of heat. Therefore the rate of energy transfer is slower and requires longer time to affect your hand in the same way.
d. The air is only transmitting energy between the oven walls and your hand. The actual thermal energy is present in the metal walls.
e. The air can convect and move away from your hand. The metal cannot move away.