Physical vs Chemical Changes

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 changes in shape, size, or state (like melting or freezing).

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and includes changes such as burning, rusting, or cooking.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Which of the following is NOT an example of a chemical change?

Back

Breaking a pencil is NOT an example of a chemical change; it is a physical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What evidence indicates a physical change has occurred?

Back

Evidence of a physical change includes changes in shape, size, or state, but does not produce a new substance.

Front

Is melting butter for popcorn a chemical or physical change?

Back

Melting butter for popcorn is a physical change.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Front

What is an example of a chemical reaction?

Back

An example of a chemical reaction is rust forming on iron.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to the molecules during a physical change?

Back

During a physical change, the molecules may change their arrangement or state, but their chemical structure remains the same.

Tags

NGSS.MS-PS1-4

Front

What happens to the molecules during a chemical change?

Back

During a chemical change, the molecules rearrange to form new substances with different chemical properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.

Tags

NGSS.MS-PS1-4

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5