By the end of the day today: I will be able to analyze a change in matter and determine if it is a chemical or physical change.

 Matter  Has mass and takes up space  Everything around us is matter

 Matter can change  Examples: Freeze, cut, burn, etc.  2 types of changes 1. Physical changes 2. Chemical changes

 Definition: when the state or form of matter is changed without changing its chemical composition.  Examples: cutting, freezing, melting, etc.

 Definition: takes place on a molecular level and produces a new chemical substance.  A chemical change always involves a chemical reaction.

 Evidence of a chemical change:  color change, gas production, and release of heat, light, odor, or sound.  Examples: Burning (combustion), rusting, tarnishing and fermenting

 You have 5 seconds to make a decision about whether the change shown is physical or chemical.  Lift up your card indicating which kind of change you think it is.

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 If you’re at an odd seat, turn to the next even seat (1  2, 3  4, etc.)  Organize the given scenarios into two piles: physical change and chemical change  You have four minutes to work with your partner!  Good Luck!

Physical ChangesChemical Changes  Chlorine gas liquefies at -35 °C under normal pressure  Mixing sugar with coffee  Ice freezing in cement breaking it apart  Boiling water for soup  Making Kool-Aid  Mixing green and yellow paint  Water condensing into clouds above a lake  Hydrofluoric acid attacks glass  Wood Burning  Autumn leaves changing color  Silver tarnishing  A nail rusting  Combustion of gasoline  Wood rotting

 Monday Extended Class packet