1. Physical or Chemical Properties

2. Matter Matter is anything that takes up space and has mass.
Workbook – Read pages

3. Physical or Chemical
Matter can change in two ways – physical or chemical.

4. Physical Change
With a physical change no new substance is created and the original matter can be recovered. Physical change does not change the composition of the matter. The original matter is still present. The substance may seem different, but the way the atoms are linked up are the same.

5. Physical Change Physical changes include: Changing the shape or size
Dissolving
Changing from one state of matter to another

6. Matter
Matter can change from one state to another by increasing or decreasing temperature or pressure.
Read Workbook pages

7. Five States of Matter Bose-Einstein Condensates Solids Liquids Gases
Plasmas

8. By adding energy the state changes.
plasma
+ energy
gas
+energy
liquids
solids

9. Examples of Physical Change
water evaporating or water changing to steam
clothes drying in a dryer
chopping wood - wood ground to sawdust
erosion
rock breaking
mixing Kool-Aid

10. Chemical Change
When a chemical change takes place, a new substance is made. The old matter is no longer present. The matter can not be changed back into its original state. The way the molecules are linked up is different when a chemical change takes place.

11. Signs of Chemical Change
gas bubbles
color change - leaves turning colors in the fall, rust appearing
disappearance of color – fading fabric
heat or light

12. Examples of Chemical Changes
fruit rotting, food spoiling
rust
decay of plants
burning wood
silver tarnishing
car burning gas
baking bread

13. Practice
Number your paper 1 – 10. Write chemical or physical for each of the following to describe the type of change which is taking place.

14. 1. Is this a physical or chemical change?
dirt added to a puddle of water

15. 2. Is this a physical or chemical change?
making whip cream

16. 3. Is this a physical or chemical change?
baking soda fizzes with vinegar

17. 4. Is this a physical or chemical change?
sharpening a pencil

18. 5. Is this a physical or chemical change?
a stick broken into small pieces

19. 6. Is this a physical or chemical change?
sugar turns brown, then black with heat

20. 7. Is this a physical or chemical change?
using hot water to expand a metal cup

21. 8. Is this a physical or chemical change?
freezing water

22. 9. Is this a physical or chemical change?
cornstarch turns black with iodine

23. 10. Is this a physical or chemical change?
toasting a marshmallow

24. The Answers

25. dirt added to a puddle of water
1. Physical Change
dirt added to a puddle of water

26. 2. Physical Change
making whip cream

27. baking soda fizzes with vinegar
3. Chemical Change
baking soda fizzes with vinegar

28. 4. Physical Change
sharpening a pencil

29. a stick broken into small pieces
5. Physical Change
a stick broken into small pieces

30. sugar turns brown, then black with heat
6. Chemical Change
sugar turns brown, then black with heat

31. using hot water to expand a metal cup
7. Physical Change
using hot water to expand a metal cup

32. 8. Physical Change
freezing water

33. cornstarch turns black with iodine
9. Chemical Change
cornstarch turns black with iodine

34. toasting a marshmallow
10. Chemical Change
toasting a marshmallow