Chemical Change

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What is a chemical change?

Back

A process where one or more substances are transformed into new substances with different properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What are the characteristics of chemical changes?

Back

Chemical changes are usually irreversible, involve the formation of new substances, and result in a change in the way atoms are bonded.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Can you give an example of a chemical change?

Back

Burning wood, rusting iron, or baking a cake are examples of chemical changes.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is an example of a physical change?

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Melting ice or breaking a glass are examples of physical changes.

Front

What happens to the properties of a substance during a chemical change?

Back

The properties change because new substances with different characteristics are formed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

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

Back

A chemical change results in the formation of new substances, while a physical change does not.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Front

What is an indicator of a chemical change?

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

Tags

NGSS.MS-PS1-2

Front

What does it mean for a change to be irreversible?

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It means that the original substance cannot be recovered after the change has occurred.

Front

What is the role of energy in chemical changes?

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Energy is either absorbed or released during a chemical change, often in the form of heat or light.

Tags

NGSS.HS-PS1-4