Chemical & Physical Changes

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What is a Chemical Change?

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A process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, or gas production.

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What is a Physical Change?

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A change that affects one or more physical properties of a substance without altering its chemical composition.

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Examples of Chemical Changes include:

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Fizzing, foaming, burning, rusting, and browning of an apple.

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What indicates a Chemical Change?

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Signs include temperature change, color change, gas production, and formation of a precipitate.

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What is Rusting?

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A chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide.

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What happens during a Physical Change?

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The form of a substance changes, but its chemical identity remains the same.

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Is melting ice a Chemical or Physical Change?

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Physical Change.

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Is burning wood a Chemical or Physical Change?

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Chemical Change.

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What is an example of a Physical Change?

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Freezing water, cutting paper, or dissolving sugar in water.

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What is an example of a Chemical Change?

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Browning of an apple, as it involves a chemical reaction.