Physical and Chemical Changes

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into new substances with different properties. Examples include rusting, burning, and frying an egg.

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NGSS.MS-PS1-5

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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 melting, freezing, and dissolving.

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What happens during a chemical change?

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During a chemical change, new substances are produced, and the original substances undergo a transformation.

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NGSS.MS-PS1-5

Front

What happens during a physical change?

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During a physical change, the form or appearance of a substance changes, but its chemical composition remains the same.

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Is rusting a physical or chemical change?

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Rusting is a chemical change because it involves the reaction of iron with oxygen to form rust, a new substance.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

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Is melting ice a physical or chemical change?

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Melting ice is a physical change because the ice changes from solid to liquid without changing its chemical composition.

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What is an example of a chemical change?

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Frying an egg is an example of a chemical change because the proteins in the egg undergo a chemical transformation.

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NGSS.MS-PS1-5

Front

What is an example of a physical change?

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Water freezing into ice is an example of a physical change because it changes state from liquid to solid without changing its chemical composition.

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NGSS.MS-PS1-4

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What indicates a chemical change has occurred?

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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

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What is the difference between a reactant and a product?

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A reactant is a substance that undergoes a chemical change, while a product is a substance that is formed as a result of that change.

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