physical and chemical changes

Front

What is a chemical change?

Back

A chemical change is a process in which new substances are formed, involving a rearrangement of atoms and a change in chemical properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

Give an example of a physical change.

Back

Mixing two colors of paint is an example of a physical change.

Tags

NGSS.5-PS1-4

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas, color change, temperature change, and formation of a precipitate are signs of a chemical reaction.

Tags

NGSS.MS-PS1-2

Front

Is mixing two colors of playdough a physical or chemical change?

Back

Mixing two colors of playdough is a physical change.

Front

What happens to the chemical composition during a chemical change?

Back

The chemical composition changes, resulting in the formation of new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is an example of a chemical reaction?

Back

Baking cookies in an oven is an example of a chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Can a physical change be reversed?

Back

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

Tags

NGSS.MS-PS1-4

Front

Can a chemical change be reversed?

Back

Chemical changes are usually not reversible by simple physical means.

Front

What is an example of a sign of a physical change?

Back

Change in state, such as ice melting into water, is an example of a physical change.

Tags

NGSS.MS-PS1-4