1. Elements, Compounds, and Mixtures January 12 th and 13 th

2. Determine if they are physical or chemical properties Blue Color Physical

3. Density Physical

4. Flammability Chemical

5. Solubility Physical

6. Reacts with Acid Chemical

7. Sour Taste Physical

8. Melting Point Physical

9. Boiling Point Physical

10. Odor Physical

11. Rusting Chemical

12. Evaporation Physical

13. Ice Melting Physical

14. Milk Souring Chemical

15. Wood Rotting Chemical

16. Pancakes cooking on a griddle Chemical

17. Grass growing from seed Chemical

18. A tire is inflated with air Physical

19. Water is absorbed by a paper towel Physical

20. Main Categories of Matter  Pure Substances  Elements  Compounds  Mixtures  Homogeneous  Heterogeneous

21. Pure Substances  Definition- Have the same composition throughout. Most occur naturally.  Elements  Compounds

22. Elements  Cannot be separated into a simpler substance by physical or chemical changes.  Have unique characteristics, such as boiling point or density.

23. Compounds  Are created when two or more different elements combine chemically.  Cannot be broken down by physical changes, but can be broken down by chemical means.  The compound does not retain the properties of the components that formed it.

24. Mixtures  Forms when two or more substances are physically combined. They can be physically separated.  Homogeneous  Heterogeneous

25. Homogeneous  The parts are evenly distributed and looks the SAME throughout

26. Heterogeneous  The parts are not evenly distributed and look DIFFERENT throughout.