![Page 1: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/1.jpg)
Physical & Chemical Changes
![Page 2: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/2.jpg)
What is a physical change?
•In physical changes, matter may look, act, or feel different. But it is still the SAME thing.
•The molecules have NOT changed.
![Page 3: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/3.jpg)
Types of Physical Changes
• Breaking• Crushing• Cutting• Bending• Melting• Freezing• Boiling
![Page 4: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/4.jpg)
Examples of Physical Changes
• If you tear, fold, or crumple a piece of paper, it looks different. But it is still a piece of paper.
• If you break, sharpen, or chew on a pencil, it looks different. But it is still a pencil.
![Page 5: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/5.jpg)
Ice can change to water. Water can change to ice. It’s still H2O either way.
![Page 6: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/6.jpg)
Liquid water can change to water vapor when it is heated.
Water vapor can change to liquid water when it is cooled.
It’s still H2O either way.
![Page 7: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/7.jpg)
![Page 8: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/8.jpg)
What is a chemical change?
•In chemical changes, matter becomes something completely different.
•The molecules have changed.
![Page 9: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/9.jpg)
Examples of Chemical Changes
• Think about baking a cake. The batter is a liquid mixture of flour, sugar, water, and other ingredients. When you heat it in the oven, the batter turns into a yummy solid. You can’t ever change it back into flour, sugar, water, and other ingredients. The batter has become something new.
![Page 10: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/10.jpg)
•If you leave iron out for a long time, it will rust.
•When fireworks change colors, a chemical change is happening.
•If you light a match, it can never be the same again.
Examples of Chemical Changes
![Page 11: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/11.jpg)
Show Me!
•Draw an example of a physical change.
•Draw an example of a chemical change.
![Page 12: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/12.jpg)
You Decide!frying an
egg
![Page 13: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/13.jpg)
This is a chemical change. The egg can never go back to the way it was before.
![Page 14: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/14.jpg)
boiling water
![Page 15: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/15.jpg)
This is a physical change. The
water vapor that is produced will condense into
liquid water when it cools.
![Page 16: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/16.jpg)
burning gasoline
![Page 17: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/17.jpg)
This is a chemical change. Once your
car has used the gasoline, it can never
be used again.
![Page 18: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/18.jpg)
breaking glass
![Page 19: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/19.jpg)
This is a physical change. It looks
different, but it’s still glass.
![Page 20: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/20.jpg)
compressing (squeezing)
a spring
![Page 21: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/21.jpg)
This is a physical change. It looks
different, but it’s still a spring.
![Page 22: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/22.jpg)
souring milk
![Page 23: Physical & Chemical Changes. What is a physical change? In physical changes, matter may look, act, or feel different. But it is still the SAME thing](https://reader036.vdocuments.net/reader036/viewer/2022062408/56649ed55503460f94be5e41/html5/thumbnails/23.jpg)
This is a chemical change. Rotten foods
and drinks can never go back to the way they
were before. One big clue is the smell. Strong odors can be a sign of a
chemical change.