1. Which picture below represents atoms/molecules in a solid?

2. Which picture below represents atoms/molecules in a liquid?

3. Which picture below represents atoms/molecules in a gas?

A.

B.C.

C

B

A

ReviewReviewStates of matter

Solid Liquid Gas Plasma

Physical ChangePhysical Change

Change in matter that Change in matter that does notdoes not produce new produce new productsproductsMay look different, but itMay look different, but it’’s s notnot a new substance a new substance““EasilyEasily”” reversed reversed

Physical ChangePhysical ChangeChemical properties are Chemical properties are notnot changed changedNo energy given or No energy given or taken taken unlessunless there is a there is a change of statechange of state

Change of StateChange of StateMolecules gain or lose kinetic Molecules gain or lose kinetic energyenergyMelting/freezing, Melting/freezing, evaporating/condensation evaporating/condensation

Change of StateChange of StateSublimationSublimation

Going from a solid to a Going from a solid to a gasgas

Skips the liquid stateSkips the liquid state

Chemical ChangeChemical ChangeMatter changes from one Matter changes from one kind of material to anotherkind of material to anotherThe atoms The atoms do notdo not change changeThey rearrange themselvesThey rearrange themselvesNot Not ““easilyeasily”” reversed reversed

Chemical ChangeChemical ChangeThe new substances The new substances have new propertieshave new propertiesChemical change takes Chemical change takes place during a chemical place during a chemical reactionreaction

EnergyEnergyAlways a part of a Always a part of a chemical changechemical change

Given or takenGiven or taken