Physical vs. Chemical Changes

Front

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

Back

A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances with different chemical properties.

Front

Which of the following is an example of a physical change?

Back

Breaking a pencil.

Front

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 happens to the chemical composition of a substance during a chemical change?

Back

The chemical composition changes as new substances are formed.

Tags

NGSS.MS-PS1-2

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed, such as melting and freezing.

Tags

NGSS.MS-PS1-4

Front

What is an example of a chemical change in nature?

Back

Photosynthesis, where plants convert sunlight into food.

Tags

NGSS.MS-LS1-6

NGSS.MS-PS1-2

Front

What type of change occurs when a nail rusts?

Back

A chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What are some indicators of a chemical change?

Back

Color change, temperature change, gas production, and the formation of a precipitate.

Tags

NGSS.MS-PS1-2

Front

Is dissolving sugar in water a physical or chemical change?

Back

It is a physical change because the sugar can be recovered by evaporating the water.

Front

What is an example of a physical change that occurs in everyday life?

Back

Melting ice.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5