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.

Back

Melting ice is an example of a physical change.

Tags

NGSS.5-PS1-4

Front

Give an example of a chemical change.

Back

Cooking an egg is an example of a chemical change.

Tags

NGSS.MS-PS1-2

Front

What happens to iron when it rusts?

Back

When iron rusts, it undergoes a chemical change due to a reaction 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

NGSS.MS-PS1-5

Front

What is an indicator of a chemical change?

Back

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

Tags

NGSS.MS-PS1-2

Front

What is an example of a process that is both a physical and chemical change?

Back

Burning wood is a chemical change, but the ash produced can be considered a physical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Front

What is boiling water an example of?

Back

Boiling water is an example of a physical change, as it changes from liquid to gas without altering its chemical composition.

Tags

NGSS.MS-PS1-4

Front

What is the role of heat in chemical changes?

Back

Heat can provide the energy needed to break bonds in reactants, facilitating a chemical change.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4