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

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

Chemistry: Changing Matter

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?

The substance does not change into something else

Changes in: Size

Shape

Volume

State of matter

Physical Changes

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

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

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.)

Chemical or Physical Change?