8. The heat transfer that takes place by energy moving directly from molecule to molecule is (a. conduction b. convection c. radiation d. sublimation).

9. Radiations is a heat transfer that (a. does not require matter b. travels in a vacuum c. comes from all objects with a temperature above absolute zero d. all of the above).

10. Styrofoam is a good insulator because (a. it contains many pockets of air b. it is plastic that conducts heat poorly c. it is not very dense d. of the structure of the molecules that make up the Styrofoam).

11. When a solid, liquid or a gas changes from one physical state to another the change is called (a. melting b. sublimation latent heat d. a phase change).

12. The process by which liquid is changed to gas is (a. condensation b. evaporation

c. sublimation d. all of the above).

13. Dry ice is an example of a material that undergoes (a. condensation b. evaporation

c. sublimation d. none of the above)

14. The thermos bottle is used to keep liquids hot or cold because it (a. allows conduction of heat b. prevents transfer of heat c. decreases the temperature of the liquid d. allows condensation of water)

15. The amount of heat necessary for a phase change to occur is known as

(a. specific heat b. latent heat c. calorie d. none of the above).