Physical and Chemical Properties 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

8/23 8/24 Unit 2 Plan of Attack Physical and Chemical Properties Binder: Unit 2 Unit 2 Plan of Attack 8/23 Physical and Chemical Properties 8/24 Physical and Chemical Changes

Why does this Matter? Has mass and takes up space Everything around us is matter

What’s the Difference? Matter can change Examples: Freeze, cut, burn, etc. 2 types of changes Physical changes Chemical changes

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

Changes in State: Vocabulary

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

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

Name That Change!! Talk over scenario with your desk partner(s) Lift up your chemical or physical card Each correct answer= 1 point Tie-Breaker at the end!!! Prize!!

ice melting P

burning a chemistry book

melting iron P

frying an egg C

fireworks exploding in the sky C

turning wood into a baseball bat P

baking a cake C

sharpening a pencil P

carving a watermelon into a creepy looking face

pouring liquid nitrogen into a bowl and watching it vaporize

sulfuric acid added to sugar http://www.youtube.com/watch?v=nqDHwd9rG0s