Physical Change and Chemical Change

Front

What are the evidences of a chemical reaction?

Back

Color change, temperature change, gas production, precipitate formation, and light emission.

Tags

NGSS.MS-PS1-2

Front

What does melting indicate?

Back

A physical change.

Tags

NGSS.MS-PS1-4

Front

What is a rusting nail an example of?

Back

A chemical change.

Tags

NGSS.MS-PS1-2

Front

If two substances react and the temperature of the mixture increases, what type of reaction is it?

Back

Exothermic reaction.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Tags

NGSS.MS-PS1-4

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is an example of a physical change?

Back

Melting ice.

Tags

NGSS.MS-PS1-4

Front

What is an example of a chemical change?

Back

Burning wood.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to the mass of substances during a chemical change?

Back

The mass is conserved; it remains the same before and after the reaction.

Tags

NGSS.MS-PS1-5

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4