Thermal Energy and Heat Transfer

What is thermal energy?

• The energy that is stored.

• The energy of matter in motion.

• The total energy of all its moving particles.

• The average energy of all its moving particles.

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Define heat transfer.

• The process of thermal energy moving from one object or substance to another due to a difference in volume.

• The process of thermal energy moving from one object or substance to another due to a difference in density.

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

• The process of thermal energy moving from one object or substance to another due to a difference in pressure.

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What are the three types of heat transfer?

• reflection, absorption, and transmission

• evaporation, condensation, and sublimation

• compression, expansion, and adiabatic

• conduction, convection, and radiation

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What is conduction?

• The process of transferring heat through a vacuum

• The process of converting heat into electricity

• Transfer of heat through direct contact with a material

• The process of converting electricity into heat

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Give an example of conduction.

• Walking into a room and feeling the cool air.

• Touching a hot pan and feeling the heat transfer to your hand.

• Standing near a fire.

• Laying out in the sun to get a tan.

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What is convection?

• Transfer of heat through space

• Transfer of heat through direct contact

• Transfer of heat through the movement of a fluid

• Transfer of heat through the movement of a solid

Which is NOT an example of convection.

• Heating a room with a radiator

• Using a hairdryer

• Touching a hot car

• Boiling water on a stove

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What is radiation?

• The emission of sound waves

• The emission of energy as electromagnetic waves or as moving subatomic particles

• The process of converting matter into energy

• The process of converting energy into matter

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How does heat transfer occur?

• Temperature differences move from more heat to less heat.

• Cold moves to objects that are warmer

• Expansion, compression, and diffusion

• Heat is destroyed as it moves.

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What is temperature?

• Temperature is a measure of the density of a substance or object.

• Temperature is a measure of the amount of heat in a substance or object.

• Temperature is a measure of the electrical conductivity of a substance or object.

• Temperature is a measure of the average kinetic energy of the particles in a substance or object.

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