Physical and 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 changing its chemical composition. Examples include cutting, bending, or melting.

Front

What is a chemical change?

Back

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

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Is baking cookies a physical or chemical change?

Back

Chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Is a rotting pumpkin a physical or chemical change?

Back

Chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Is slicing a banana a physical or chemical change?

Back

Physical change.

Front

Is sharpening a pencil a physical or chemical change?

Back

Physical change.

Front

Can you reverse a physical change?

Back

Yes, physical changes can often be reversed.

Front

Can you reverse a chemical change?

Back

No, chemical changes usually cannot be reversed.

Front

What happens to the molecules during a physical change?

Back

The molecules may change their form or appearance, but their chemical structure remains the same.

Tags

NGSS.MS-PS1-4

Front

What happens to the molecules during a chemical change?

Back

The molecules rearrange to form new substances with different properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5