Science Grade 7: Thermal Energy Unit Exam Review

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What is thermal energy?

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Thermal energy is the total kinetic energy of the particles in a substance, which is related to its temperature.

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What is temperature a measure of?

Back

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

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What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between particles.

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What is convection?

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Convection is the transfer of thermal energy through the movement of fluids (liquids and gases) caused by differences in temperature.

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What is radiation?

Back

Radiation is the transfer of thermal energy through electromagnetic waves, such as heat from the sun.

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How does temperature affect kinetic energy?

Back

Temperature and kinetic energy are directly proportional; as temperature increases, the kinetic energy of particles also increases.

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What is an example of conduction?

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An example of conduction is a metal spoon getting hot when placed in a pot of boiling water.

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What is an example of convection?

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An example of convection is warm air rising and cool air sinking in a room, creating a circulation of air.

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What is an example of radiation?

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An example of radiation is feeling the warmth of the sun on your skin.

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What happens to particles in a substance when it is heated?

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When a substance is heated, its particles gain kinetic energy and move faster.