11. The process by which a solid changes directly into a gas without passing through the liquid phase is called:
A) Sublimation
B) Melting
C) Evaporation
D) Condensation
Answer: A) Sublimation
12. Which of the following statements is true about thermal expansion?
A) All materials contract when heated
B) All materials expand when heated
C) Only solids can expand when heated
D) Only liquids can expand when heated
Answer: B) All materials expand when heated
13. The measure of the average kinetic energy of the particles in a substance is called:
A) Temperature
B) Heat
C) Thermal energy
D) Entropy
Answer: A) Temperature
14. The transfer of heat by electromagnetic waves is called:
A) Conduction
B) Radiation
C) Convection
D) Insulation
Answer: B) Radiation
15. Which of the following materials is a good insulator of heat?
A) Aluminum
B) Copper
C) Glass
D) Styrofoam
Answer: D) Styrofoam
