Physical and Chemical Changes

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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 changing its chemical composition. Examples include changes in shape, size, or state (like melting or freezing).

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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. It involves a chemical reaction and changes the composition of the original substance. Examples include rusting, burning, and cooking.

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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 baking a cake, where ingredients react to form a new substance.

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What is a physical property?

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A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity. Examples include color, shape, size, and melting point.

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What is a chemical property?

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A chemical property is a characteristic of a substance that becomes evident during a chemical reaction. It describes the substance's ability to undergo changes that transform it into different substances.

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What evidence indicates a physical change?

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Evidence of a physical change includes changes in shape, size, or state of matter, but no new substances are formed.

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What evidence indicates a chemical change?

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

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Is dissolving Kool Aid in water a physical or chemical change?

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Dissolving Kool Aid in water is a physical change because it does not create a new substance.

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What happens to the molecules during a physical change?

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During a physical change, the molecules rearrange but do not change their chemical structure.