Properties of Matter

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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 inflating a tire.

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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 the substance's identity. Examples include color, shape, size, and density.

Tags

NGSS.MS-PS1-4

Front

What is a chemical change?

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A chemical change is a process that involves the transformation of one substance into another, resulting in a change in chemical composition. Examples include rusting, burning, and cooking.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a chemical property?

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A chemical property is a characteristic that indicates how a substance can change into another substance. Examples include reactivity with acid, flammability, and oxidation states.

Tags

NGSS.HS-PS1-1

Front

Give an example of a physical change.

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Sharpening a pencil is an example of a physical change because it alters the shape of the pencil without changing its chemical composition.

Front

Give an example of a chemical change.

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Burning wood is an example of a chemical change because it transforms the wood into ash and smoke, changing its chemical composition.

Tags

NGSS.MS-PS1-2

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 identity remains the same.

Front

What happens during a chemical change?

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During a chemical change, the substances involved undergo a transformation that results in the formation of new substances with different properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the difference between physical and chemical properties?

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Physical properties can be observed without changing the substance, while chemical properties can only be observed during a chemical change.

Front

What is an example of a physical property?

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Color is an example of a physical property, as it can be observed without changing the substance.