1. Physical and Chemical Changes in Matter
How to tell the difference

2. Matter- what is it?
Defined as anything that has mass and takes up space
Can be measured with tools like:
Graduated cylinder
Triple beam balance
Ruler

3. Physical Change
Substance may seem different, but no new substance is created!!!!

4. Physical Change
Molecules stay the same, but move farther apart

5. It’s a physical change if…
It changes shape or size.

6. It’s a physical change if…
It dissolves.

7. It’s a physical change if...
It changes phase, or state of matter.

8. Changing states of matter- Physical Change
Heat added:
More heat added:
Melts
Boils or Evaporates
Gets even colder,
Heat removed:
Cools down,
Heat removed:
Condenses
Freezes

9. Chemical Change
Makes new substances as the result of a chemical reaction.

10. Chemical Change
Molecules are re-arranged forming a new substance.

11. Molecules are re-arranged forming a new substance.
Chemical Change
Molecules are re-arranged forming a new substance.

12. It’s a chemical change if….
It burns.

13. It’s a chemical change if….
Temperature changes without heating/cooling.

14. It’s a chemical change if...
It bubbles (makes a gas).

15. It’s a chemical change if...
It changes color.

16. It’s a chemical change if...
It forms a precipitate (unexpected formation of a solid).

17. It’s a chemical change if...
Change in odor or smell.

18. Put Your Notes Away…

19. Ralley Round Table It burns It changes temperature
List the evidence for a chemical reaction
Hint… there are 6.
It burns
It changes temperature
It bubbles (a gas forms)
It changes color
A precipitate forms
Change in odor or smell