Physical and Chemical Changes

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What is a Physical Change?

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A Physical Change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

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What is a Chemical Change?

Back

A Chemical Change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and cooking.

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What is Matter?

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Matter is anything that has mass and takes up space.

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What is Mass?

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Mass is a measure of the amount of matter in an object, usually measured in grams or kilograms.

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What is Density?

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Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

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What happens during Evaporation?

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Evaporation is the process where liquid turns into vapor or gas, usually occurring at the surface of the liquid.

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What happens during Condensation?

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Condensation is the process where vapor or gas turns into liquid, often seen when water droplets form on a cold surface.

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What is an example of a Physical Change?

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Melting ice into water is an example of a Physical Change.

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What is an example of a Chemical Change?

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Burning wood is an example of a Chemical Change.

Front

What is Freezing?

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Freezing is the process where a liquid turns into a solid when its temperature is lowered.