1. Physical and Chemical Changes
How to Find out
And
Test
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Physical Change
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Physical Change
Substance may seem different, but the way the atoms link up is the same.
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5. It’s a physical change if
It changes shape or size
It dissolves.
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It’s a physical change if...
It changes phase (freezes, boils, evaporates, condenses)
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Chemical Change
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Chemical Change
Changes the way the molecules link up
Makes new substances
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9. It’s a chemical change if….
It burns
Temperature changes without heating/cooling
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10. It’s a chemical change if...
It bubbles
(makes a gas)
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11. It’s a chemical change if...
It changes color
It forms a precipitate
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TEST
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13. What kind of change is it if someone...
Tears up paper?
Physical change
Mixes salt and water?
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14. What kind of change is it if someone...
Burns paper?
Chemical change
Evaporates salt water?
Physical change
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15. What kind of change is it if someone...
Mixes vinegar and baking soda?
Chemical change
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Quiz
Number your paper (1-10)
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17. 1. A. Physical Change B. Chemical Change
Rusting nails
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18. 2. A. Physical Change B. Chemical Change
Effervescent tablet
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19. 3. A. Physical Change B. Chemical Change
Cut paper
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20. 4. A. Physical Change B. Chemical Change
Vinegar and Baking soda
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21. 5. A. Physical Change B. Chemical Change
Salt and water
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22. 6. A. Physical Change B. Chemical Change
Broken glass
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23. 7. A. Physical Change B. Chemical Change
Burning wood
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24. 8. A. Physical Change B. Chemical Change
Ice melting
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9. A. Physical Change B. Chemical Change
Removing iron filings from a mixture
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10. A. Physical Change
B. Chemical Change
Boiling water
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27. Check your paper and place in notebook
1. B - Chemical
2. B - Chemical
3. A - Physical
4. B - Chemical
5. A - Physical
6. A - Physical
7. B - Chemical
8. A - Physical
9. A - Physical
10. A - Physical
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