Chemical and Physical Changes

Front

What is a chemical change?

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A chemical change is a process where substances combine or break apart to form new substances with different properties. Examples include baking, rusting, and burning.

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What is a physical change?

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A physical change is a process that alters the form or appearance of a substance but does not change its chemical composition. Examples include melting, freezing, and crushing.

Front

Is baking cupcakes a physical or chemical change?

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Chemical Change

Front

Is crushing a Coke can a physical or chemical change?

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Physical Change

Front

What happens during a chemical change?

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During a chemical change, bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

Front

What happens during a physical change?

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During a physical change, the substance may change its state or appearance, but its chemical identity remains the same.

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What is an example of a chemical change?

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An example of a chemical change is copper tarnishing, where copper reacts with oxygen to form copper oxide.

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What is an example of a physical change?

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An example of a physical change is melting ice into water, where the substance remains H2O.

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What are indicators of a chemical change?

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Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

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What are indicators of a physical change?

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Indicators of a physical change include changes in state (solid, liquid, gas), shape, or size without altering the substance's chemical identity.