1. How is heat transfer related to temperature?

a. Heat is defined as energy transferred dues to a temperature difference.

B. Heat does not flow unless there is thermal equilibrium.

C. Heat is defined as temperature.

D. The flow of temperature is due to heat differences between materials.

E. Any two objects in thermal equilibrium will have heat flow.

F. No heat flows unless the temperature is the same.

2. Putting a lid on a boiling pot greatly reduces the heat transfer necessary to keep it boiling. Explain why.

a. The lid minimizes heat transfer by convection.

B. The lid minimizes heat transfer by conduction.

C. The lid minimizes heat transfer by radiation.

D. No answer text provided.

3. What are the main methods of heat transfer from the hot core of Earth to its surface?

a. Convection; the bulk flow of hot molecules (lava) from the core toward the surface.

B. Conduction; heat flows through regions of metal toward regions of water.

C. Radiation; the heat from the sun is constantly reheating the Earth's core.

D. No answer text provided.

4. What are the main methods of heat transfer from the Earth's surface to outer space?

a. Radiation, infrared radiation mostly.

B. Convection; hot air rises and releases heat to outer space.

C. Conduction; heat flows through air molecules and is conducted into space.

D. No answer text provided.

5. When our bodies get too warm, they respond by sweating and increasing blood circulation to the surface to transfer thermal energy away from the core. What effect will this have on a person in a 40.0C hot tub?

a. The person in the hot tub will "flush" red as the blood vessels near the skin's surface dilate as heat is lost through the skin.

B. The person radiates heat in the infrared region causing them to look red.

C. The person conducts heat through their skin to the air, when heat is transferred the surface losing heat is red.

D. No answer text provided.