1. Physical or Chemical Properties SPI 0507. 9
Physical or Chemical Properties SPI Distinguish between physical and chemical properties.

2. Matter
Matter is anything that takes up space and has mass.

3. Bell Work Sharpen all of the pencils you will need for class.
Take the sets of pictures off of the filing cabinet.
Sort the pictures into categories.
“I can distinguish between physical and chemical properties”

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

6. 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.

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

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

9. States of Matter
Solids
Liquids
Gases

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

11. 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

12. 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.

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

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

15. 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.

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

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

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

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

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

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

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

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

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

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

26. The Answers

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

28. 2. Physical Change
making whip cream

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

30. 4. Physical Change
sharpening a pencil

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

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

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

34. 8. Physical Change
freezing water

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

36. toasting a marshmallow
10. Chemical Change
toasting a marshmallow

37. It’s a gas -activity
Record all of your observations in detail!

38. Exit Pass
Why do you think that zinc bubbles when it is placed in acid? Explain your answer in detail.