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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. Physical and Chemical Properties. Why does this Matter ?. Matter Has mass and takes up space Everything around us is matter . What’s the Difference?.
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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. Physical and Chemical Properties
Why does this Matter? • 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.
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!! • 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.
pouring liquid nitrogen into a bowl and watching it vaporize P
sulfuric acid on cloth C http://www.youtube.com/watch?v=s0CyLbiwHkg&NR=1&feature=endscreen
Organize that Change!! • If you’re at an odd seat, turn to the next even seat (12, 34, etc.) • Organize the given scenarios into two piles: physical change and chemical change • You have four minutes to work with your partner! • Good Luck!
Tonight’s Homework • Monday Extended Class packet