Physical and Chemical Changes-Ms J

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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. Examples include changes in state (like melting or freezing), shape (like crumpling paper), or size.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

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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. Examples include rusting, burning, and baking.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

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Which of the following is NOT an example of a physical change: crumpled paper, pencil sharpening, shrunken clothing, sour milk?

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Sour milk is NOT an example of a physical change; it is a chemical change.

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NGSS.MS-PS1-2

NGSS.MS-PS1-4

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What happens during a physical change?

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During a physical change, the form of a substance may change, but its chemical identity remains the same.

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What happens during a chemical change?

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During a chemical change, the original substances are transformed into new substances with different properties.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

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Is curling your hair a physical or chemical change?

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Curling your hair is a physical change because it alters the shape of the hair without changing its chemical structure.

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What is an example of a physical change?

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Evaporating water is an example of a physical change.

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NGSS.MS-PS3-4

Front

Which of the following is an example of a chemical change: a candle burning, baking a cake, or metal rusting?

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Metal rusting is an example of a chemical change.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

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What is the difference between a physical change and a chemical change?

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The main difference is that a physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.

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NGSS.MS-PS1-4

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What are some indicators of a chemical change?

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Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

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NGSS.MS-PS1-2