6th Grade Science Review

Front

What is a physical change?

Back

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 crushing.

Tags

NGSS.MS-PS1-4

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting, burning, and cooking.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

Tags

NGSS.MS-PS1-2

Front

What happens when two liquids react and a solid is formed?

Back

This is an example of a chemical change where a precipitate is produced.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is an example of a physical change?

Back

Crushing a soda can is an example of a physical change.

Front

What happens to the density of a wooden block when it is cut in half?

Back

Each half would have the same density as the original piece.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

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

Back

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

Tags

NGSS.MS-PS1-2

Front

Can a physical change be reversed?

Back

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

Tags

NGSS.MS-PS1-4

Front

Can a chemical change be reversed?

Back

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

Tags

NGSS.MS-PS1-2