Chemical vs. Physical 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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, involving a rearrangement of atoms.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Give an example of a physical change involving food.

Back

Blending fruits together is an example of a physical change.

Front

What happens to gallium when it melts?

Back

When gallium melts, it changes from solid to liquid but remains gallium, demonstrating a physical change.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What are changes between states of matter classified as?

Back

Changes between states of matter, such as melting, freezing, and boiling, are classified as physical changes.

Tags

NGSS.MS-PS1-4

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change, as it produces ash and gases.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Is mixing air into egg whites a physical or chemical change?

Back

Mixing air into egg whites is a physical change, as it does not alter the chemical structure of the egg whites.

Tags

NGSS.MS-PS1-2

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

NGSS.MS-PS1-5

Front

What is an indicator of a chemical change?

Back

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

Tags

NGSS.MS-PS1-2

Front

Can physical changes be reversed?

Back

Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.