Physical and chemical changes
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Transcript of Physical and chemical changes
![Page 1: Physical and chemical changes](https://reader031.fdocuments.us/reader031/viewer/2022020207/555eb2acd8b42a08408b50d1/html5/thumbnails/1.jpg)
Bell Ringer
Quietly come in and begin taking the quiz on
your desk.
![Page 2: Physical and chemical changes](https://reader031.fdocuments.us/reader031/viewer/2022020207/555eb2acd8b42a08408b50d1/html5/thumbnails/2.jpg)
Physical & Chemical Changes
![Page 3: Physical and chemical changes](https://reader031.fdocuments.us/reader031/viewer/2022020207/555eb2acd8b42a08408b50d1/html5/thumbnails/3.jpg)
MeltingSolid Liquid
H2O H2O
Have you made anything new??
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Physical property: observed with the senses; determined without changing the matter to a new substance
physical property
Ask yourself is something NEW made?
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Physical property: observed with the senses; determined without changing the matter to a new substance
Melting evaporation
color odor
physical property
density taste
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Physical Change: a change in size, shape or state of matter; substance does NOT change identity when it undergoes a physical change
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Chemical property: indicates how a substance reacts with something else; matter will be changed into a new substance after the reaction
chemical property
Ask yourself is something NEW made?
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Chemical property: indicates how a substance reacts with something else; matter will be changed into a new substance after the reaction
Reacts with water Reacts in the air
chemical property
Reacts with other chemicals
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Chemical Change: a change in the physical and chemical properties; to change one
substance into another substance
Penny + Acid??
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If you make a new substance and it can’t go back----->
chemical change.
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5 Signs of Chemical Reaction
1. Gas given off
2. Light or heat given off
3. Color change
4. Solid Precipitate formed
5. Water is formed