Matter changes all the time: Physical Change: matter keeps the same chemical properties Chemical...

Chemistry: Changing Matter

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Matter changes all the time:

Physical Change: matter keeps the same chemical properties

Chemical Change: matter changes into a different kind of matter with different properties

Lesson 1

What are Physical and Chemical Changes?


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The substance does not change into something else

Changes in: Size

Shape

Volume

State of matter

Physical Changes


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Rain to sleet

Wood to sawdust

Paper to shredded paper

Wax to melted wax

Potato to grated potato

Gemstone to carved gemstone

Copper to hammered copper

Physical Change Examples


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1 kind of matter changes into a different kind of matter with different properties

Example: Cooking foods cause them to go through a chemical change

Egg vs. cooked egg

Chemical Changes


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Causes atoms to rearrange themselves to form new kinds of matter

Clues that chemical changes have occurred: Heat Light Iron = gray

Sound Fizzing Rust = reddish orange

Color

Chemical Changes (cont.)


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Burning of a candle in an oxygen atmosphere

Changes to ash Carbon dioxide Water vapor

Chemical Changes Examples


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Chemical or Physical Change?


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Matter changes all the time: Physical Change: matter keeps the same chemical properties Chemical...

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