Heat Energy Flashcard

Front

What is heat energy?

Back

Heat energy is a form of energy that is transferred between objects due to a temperature difference. It causes changes in temperature and can affect the state of matter.

Front

How does heat energy transfer occur?

Back

Heat energy can transfer in three ways: conduction (through direct contact), convection (through fluid movement), and radiation (through electromagnetic waves).

Front

What is conduction?

Back

Conduction is the transfer of heat energy through direct contact between materials. For example, when a metal spoon is placed in a hot soup, heat moves from the soup to the spoon.

Front

What is convection?

Back

Convection is the transfer of heat energy through the movement of fluids (liquids or gases). Warm fluid rises while cooler fluid sinks, creating a circulation pattern.

Front

What is radiation?

Back

Radiation is the transfer of heat energy through electromagnetic waves. It does not require a medium, so it can occur in a vacuum, like the heat from the sun reaching the Earth.

Front

What happens to molecules when heat energy is added?

Back

When heat energy is added to molecules, they gain energy and move faster, which can lead to changes in temperature and state.

Front

What is a thermometer used for?

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A thermometer is used to measure temperature, which indicates how hot or cold an object is by measuring the average kinetic energy of its molecules.

Front

What is the effect of warm air on cooler air?

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Warm air makes cooler air move faster, which can lead to mixing and changes in temperature.

Front

What is an example of heat transfer by conduction?

Back

An example of heat transfer by conduction is touching a hot plate, where heat moves from the plate to your hand.

Front

What is an example of heat transfer by convection?

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An example of heat transfer by convection is boiling water, where hot water rises to the top and cooler water sinks.