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 different substances with distinct properties, often involving a change in chemical composition.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

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What is a physical change?

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A physical change is a process that alters one or more physical properties of a substance without changing its chemical composition.

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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 a change in color, production of light, production of heat, formation of a gas, and the formation of a precipitate.

Tags

NGSS.MS-PS1-2

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Is burning wood a physical or chemical change?

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Burning wood is a chemical change.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to water when it changes from a solid to a liquid?

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When water changes from a solid (ice) to a liquid (water), it undergoes a physical change and a change in phase of matter.

Tags

NGSS.MS-PS1-4

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What type of change is rusting?

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Rusting is a chemical change.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

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

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A physical change affects the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances with different properties.

Tags

NGSS.MS-PS1-2

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What is an example of a physical change?

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An example of a physical change is chewing food.

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What is phase change?

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A phase change is a transition of matter from one state (solid, liquid, gas) to another, such as melting, freezing, condensation, or evaporation.

Tags

NGSS.MS-PS1-4

Front

Can a chemical change be reversed?

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Most chemical changes are not easily reversible, as they involve the formation of new substances.

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NGSS.MS-PS1-2