Thermal Energy and Matter

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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 happens to water at 100°C?

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Water boils and changes from a liquid to a gas.

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What is vaporization?

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Vaporization is the process where a liquid turns into a gas, which can occur through boiling or evaporation.

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What is thermal expansion?

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Thermal expansion is the increase in volume of a substance when it is heated.

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What is thermal contraction?

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Thermal contraction is the decrease in volume of a substance when it is cooled.

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What is the boiling point of water?

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The boiling point of water is 100°C at standard atmospheric pressure.

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What is sublimation?

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Sublimation is the process where a solid changes directly into a gas without becoming a liquid first.

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What is the relationship between temperature and thermal energy?

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As temperature increases, the thermal energy of a substance also increases.

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What is an example of thermal expansion in everyday life?

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An example is a metal lid that becomes easier to open after being heated.

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What is the process of melting?

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Melting is the process where a solid turns into a liquid when heated.

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