States of

Matter

Can Matter Change State?

• Can it change from a solid to a liquid or a liquid to a gas?

How?

Temperature or Pressure

http://www.harcourtschool.com/activity/states_of_matter/

0 degree C

-78.5 degree C

-196 degree C

-268 degree C

Solid + Energy Melting

Liquid + EnergyEvaporation

Gas - Energy Condensation

liquid - Energy Freezing

What are the Terms Given to Change of State?LIQUID

GAS

LIQUID

SOLID

The Chemical Properties of a Substance Will Determine How it Behaves.• .• *When substances combine and react to form a new

substance, a chemical change has occurred.

• A chemical change occurs as a result of a chemical reaction.

• A chemical change is usually not reversible – a brand new substance has formed.

• A physical change is a change in appearance – looks different, but same substance as before.