Physical and Chemical 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 a substance changes, but its chemical composition remains the same. Examples include melting ice or breaking glass.

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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 one or more new substances with new chemical properties. Examples include baking a cake or rusting iron.

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Is baking a cake a Physical or Chemical Change?

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Baking a cake is a Chemical Change because it involves a chemical reaction that produces new substances.

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Is glass breaking into tiny shards a Physical or Chemical Change?

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Glass breaking into tiny shards is a Physical Change because the glass remains the same substance, just in a different form.

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What happens during a Chemical Change?

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During a Chemical Change, the original substances undergo a chemical reaction, resulting in the formation of new substances 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 melting ice, where the ice changes from solid to liquid but remains water.

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What is an example of a Chemical Change?

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An example of a Chemical Change is iron rusting, where iron reacts with oxygen to form rust, a new substance.

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What is the difference between Physical and Chemical Changes?

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The main difference is that Physical Changes do not create new substances, while Chemical Changes do.

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What is a sign of a Chemical Change?

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Signs of a Chemical Change include color change, temperature change, gas production, and the formation of a precipitate.

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What is a sign of a Physical Change?

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Signs of a Physical Change include changes in state (solid, liquid, gas), shape, or size without altering the substance's chemical composition.