7. Which of the statements below is TRUE about heat transfer by radiation?
A Energy is transferred by direct contact
B Energy is transferred by electromagnetic radiation
C Energy is transferred by the mass motion of molecules.
D. Energy is transferred by the fluid that moves away from heat
8. Microwaves are waves of electrical and magnetic energy moving together
through space How does a microwave oven work?
A Microwaves cause water molecules in food to vibrate, producing heat that
cooks the food
B. Microwaves cause water molecules in food to be emitted, producing heat
that cooks the food.
C. Microwaves cause water molecules in food to evaporate, producing heat
that cooks the food.
D. Microwaves cause water molecules in food to be absorbed, producing heat
that cooks the food
9. How do heat transfer by radiation occur?
A Heat transfer by radiation occurs when warmer areas rise to cooler areas in
the liquid or gas
B. Heat transfer by radiation occurs when microwaves, infrared radiation,
visible light, or another form of electromagnetic radiation is emitted
C. Heat transfer by radiation occurs when microwaves, infrared radiation
visible light, or another form of electromagnetic radiation is absorbed
D. Heat transfer by radiation occurs when microwaves, infrared radiation
visible light, or another form of electromagnetic radiation is emitted or absorbed
10. Heat is felt upon sitting in front of a fireplace or around a campfire. As the
material burns, large amounts of heat are produced. Why do you think so?
A Heat moves through space as energy waves
B. Heat is the transition of energy from one system to another
C. Heat moves through a direct contact of firewood and the fire.
D. Heat is transferred from the material that made the fire to grow spread to
other areas
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