Generation Genius: Physical & Chemical Changes

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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 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 burning, rusting, and spoiling.

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

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The state of matter can change (like solid to liquid) but the substance remains the same.

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What happens to the state of matter during a chemical change?

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The state of matter can change, and new substances are formed with different properties.

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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 milk spoiling.

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How can we identify a chemical change?

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We can identify a chemical change by observing signs such as color change, gas production, or temperature change.

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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.

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What is the difference between physical and chemical changes?

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Physical changes do not create new substances, while chemical changes do.

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What is an example of a substance that undergoes a physical change?

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Gallium is an example; it can melt and solidify without changing its chemical identity.