Chemical vs. Physical Changes

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What is a chemical change?

Back

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

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What is a physical change?

Back

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

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What happens to the substances in a chemical change?

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In a chemical change, the original substances are transformed into different substances with new properties.

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What happens to the substances in a physical change?

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In a physical change, the original substances remain the same, even though they may change form or appearance.

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What is an example of a chemical change?

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An example of a chemical change is the spoiling of milk.

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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 the flame test used for?

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The flame test is used to identify the presence of certain gases, such as hydrogen, by observing the color of the flame.

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What gas is produced when something burns?

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When something burns, it produces carbon dioxide as a byproduct.

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How can you tell if a change is physical or chemical?

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If the same substances are present before and after the change, it is a physical change. If new substances are formed, it is a chemical change.

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What is an indicator of a chemical change?

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An indicator of a chemical change can be a change in color, temperature, or the production of gas.