Cooler Chemical and Physical Changes

Front

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.

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What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What evidence indicates a physical change?

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Evidence of a physical change includes changes in shape, size, or state of matter without creating a new substance.

Front

What evidence indicates a chemical change?

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Evidence of a chemical change includes the production of gas, color change, temperature change, or the formation of a precipitate.

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What happens to the molecules during a physical change?

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During a physical change, the arrangement of molecules may change, but their chemical structure remains the same.

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What happens to the molecules during a chemical change?

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During a chemical change, the bonds between atoms are broken and new bonds are formed, resulting in new substances.

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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 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 burning wood, which produces ash and smoke.

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

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You can tell by observing if a new substance is formed (chemical) or if only physical properties change (physical).

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What is the significance of state changes in physical changes?

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State changes, such as melting or boiling, are key indicators of physical changes as they do not alter the substance's chemical identity.