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.

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

Brushing your teeth is an example of a physical change.

Front

Give an example of a chemical change.

Back

Fireworks exploding is an example of a chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to mass during physical and chemical changes?

Back

The mass remains the same during both physical and chemical changes.

Tags

NGSS.MS-PS1-5

Front

What is an example of a physical change involving water?

Back

Water boiling is an example of a physical change.

Tags

NGSS.MS-PS1-4

Front

What is an example of a physical change involving plants?

Back

Mowing the grass is an example of a physical change.

Front

What are some indicators 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

How can you differentiate between physical and chemical changes?

Back

Physical changes can often be reversed, while chemical changes usually result in new substances that cannot be easily reversed.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Tags

NGSS.MS-PS1-5