Heat Transfer

Which of the following is an example of heat conduction?

• An air vent from a furnace sending hot air into the house

• A metal cup heating up when hot water is poured into it.

• The sun melting the ice formed on a frosty lawn.

• Cool air sinking to the ground on a cold night

By what process does heat energy travel from the sun to the earth?

• Heat is radiated through space.

• Heat is conducted through air molecules.

• Heat travels through the wind.

• Convection of heat through air currents.

In a room in the wintertime, where would you find the warmest air?

• near the ceiling

• near the floor

• in the corners   

• by a window

Which of the following is not a method of heat transfer?

• Conduction

• Convection

• Condensation

• Radiation

Which of the following is the best conductor of heat?

• air

• plastic

• water

• aluminum

Which of the following is the worst conductor of heat?

• air

• plastic

• a vacuum

• aluminum

In which of the following can convection currents be set up?

• air

• plastic

• water

• aluminum

This type of heat transfer can occur in a vacuum:

• Conduction

• Convection

• Radiation

• Condensation

Which one of the following statements concerning the transfer of heat is not correct?

• Conduction and convection may take place in solids.

• Convection may take place in liquids and gases.

• Convection and radiation may take place in gases.

• Radiation and conduction may take place in solids.

• Conduction may take place in solids and liquids.

Which of the following methods of heat transfer involves the actual physical movement of high temperature molecules to regions of lower temperature?

• condensation

• convection

• conduction

• radiation