Physical & 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 altering its chemical composition.

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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 different properties.

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What is evidence of a chemical change?

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Evidence of a chemical change includes the formation of a new substance, a change in temperature, a color change, or the formation of a precipitate.

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What happens during digestion?

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During digestion, both physical and chemical changes occur to break down food into nutrients.

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What is an example of a physical change in the kitchen?

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An example of a physical change in the kitchen is chopping vegetables.

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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 does the formation of a precipitate indicate?

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The formation of a precipitate indicates that a chemical change has occurred, resulting in a new substance.

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What is NOT evidence of a chemical change?

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A state of matter change (like melting or freezing) is NOT evidence of a chemical change.

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What is a common physical change that occurs when heating water?

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When heating water, it undergoes a physical change from liquid to gas (steam) without changing its chemical composition.

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What is a color change an indicator of?

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A color change can be an indicator of a chemical change, suggesting that new substances have formed.