21. The transfer of heat energy through the emission and absorption of electromagnetic waves is called:
a) Conduction
b) Convection
c) Radiation
d) Insulation
22. Which of the following materials is a good conductor of electricity but a poor conductor of heat?
a) Copper
b) Aluminum
c) Wood
d) Silver
23. The process of heat transfer through the movement of electrons in a solid is called:
a) Conduction
b) Convection
c) Radiation
d) Insulation
24. Which of the following is an example of radiation?
a) Holding a spoon over a flame
b) Touching a hot stove
c) A pot of water boiling on the stove
d) Feeling the warmth of the sun on your skin
25. The transfer of heat energy by the movement of a fluid due to differences in density is known as:
a) Conduction
b) Convection
c) Radiation
d) Insulation
