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 tearing.

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What is a chemical change?

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A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and includes changes such as rusting, burning, and cooking.

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What are some clues that a chemical change has occurred?

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Clues that a chemical change has occurred include temperature change, odor change, color change, formation of bubbles (fizzing), and production of light or sound.

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What are some clues that a physical change has occurred?

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Clues that a physical change has occurred include tearing, cutting, bending, breaking, and melting.

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What happens during oxidation?

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Oxidation is a chemical change where a substance combines with oxygen, often resulting in rusting or burning.

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What is an example of a physical change?

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An example of a physical change is water freezing into ice.

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What is an example of a chemical change?

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An example of a chemical change is roasting marshmallows over a campfire.

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How does temperature change indicate a chemical change?

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A temperature change indicates a chemical change because it shows that energy is being absorbed or released during a chemical reaction.

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What is the difference between a physical change and a chemical change?

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A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.

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What is an example of a state change in matter?

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An example of a state change in matter is water boiling and turning into steam.