Chemical and Physical Changes

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What is a physical change?

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A physical change is a change in which the form or appearance of matter changes, but its chemical composition remains the same. Examples include melting, freezing, and dissolving.

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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. Examples include rusting, burning, and cooking.

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What happens to the size of matter during a physical change?

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The size of matter can change during a physical change, but the substance itself remains the same.

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What happens to the shape of matter during a physical change?

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The shape of matter can change during a physical change, but the chemical identity of the substance remains unchanged.

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What is an example of a physical change?

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

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What is an example of a chemical change?

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An example of a chemical change is vinegar reacting with baking soda to produce carbon dioxide.

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How can you identify a chemical change?

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A chemical change can be identified by the production of gas, a change in color, the formation of a precipitate, or a change in temperature.

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What is the difference between physical and chemical changes?

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Physical changes affect the form of a substance, while chemical changes result in the formation of new substances.

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What happens to the volume of matter during a physical change?

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The volume of matter can change during a physical change, but the substance itself does not change chemically.

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What is an example of a change in form?

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An example of a change in form is cutting a piece of paper into smaller pieces.