Thermal Energy Transfer

What is an example of convection?

• In a lava lamp, the warm part rises and the cool part sinks.

• A pot of water boiling on the stove.

• A fan blowing air in a room.

• Ice melting in a glass of water.

What is thermal energy transfer?

• The process of heat moving from one object or substance to another due to a temperature difference.

• The process of converting thermal energy into mechanical energy.

• The method of storing heat energy in a substance.

• The transfer of energy through electromagnetic waves.

Define convection.

• The transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

• The process of heat transfer through direct contact between materials.

• The movement of heat through electromagnetic waves.

• The circulation of air caused by the rotation of the Earth.

What is thermal conductivity?

• A measure of a material's ability to conduct heat.

• The rate at which a material absorbs light.

• The ability of a material to expand when heated.

• A measure of a material's resistance to electrical flow.

What is a good conductor of heat?

• Wood

• Plastic

• Copper

• Glass

What are the three main methods of thermal energy transfer?

• Conduction, convection, and radiation.

• Evaporation, condensation, and precipitation.

• Conduction, expansion, and compression.

• Convection, radiation, and insulation.

What is the role of insulation in thermal energy transfer?

• Insulation increases the rate of heat transfer between objects.

• Insulation has no effect on heat transfer.

• Insulation reduces the rate of heat transfer between objects.

• Insulation only works in cold environments.

True or false: Heat moves from a cooler object to a warmer object.

• True; heat moves from a cooler object to a warmer object.

• False; heat moves from a warmer object to a cooler object.

• Heat does not move between objects.

• Heat moves equally between objects regardless of temperature.

What is an example of radiation?

• The Sun heating the Earth.

• A microwave heating food.

• A fan blowing air.

• A pot boiling water.

Define conduction.

• The transfer of heat through direct contact between materials.

• The movement of heat through fluids due to density differences.

• The process of heat transfer through electromagnetic waves.

• The transfer of heat through the movement of particles in a gas.