OpenSciEd 6.2: Thermal Energy

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What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in an object.

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How does thermal energy transfer occur?

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Thermal energy transfers through conduction, convection, and radiation.

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What is conduction?

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

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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).

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What is radiation?

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Radiation is the transfer of thermal energy through electromagnetic waves, such as light.

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What happens to particles in a hot substance?

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In a hot substance, particles move faster and are more spread out compared to those in a cold substance.

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What is an open system?

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An open system is one where matter and energy can enter or leave the system.

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What is a closed system?

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A closed system is one where matter cannot enter or leave, but energy can be exchanged.

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What happens to water particles in an open system?

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In an open system, water particles can evaporate into the air.

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What is evaporation?

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Evaporation is the process where liquid water turns into water vapor (gas) due to heat.

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