1. Physical or Chemical Properties

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

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.

7. Five States of Matter Bose-Einstein Condensates Solids Liquids Gases Plasmas We are only going to concern ourselves about the three states of matter, as are common to our environment.

8. Three States of Matter Solids Liquids Gases

9. By adding energy the state changes. gas +energy liquids + energy solids

10. 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

11. 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.

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

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

14. 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.

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

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

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

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

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

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

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

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

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

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