1. Matter Anything that has mass and takes up space

2. Properties of Matter Physical – can be observed or measured without changing the composition Chemical – the ability of a substance to undergo chemical change – to form new substances

3. Examples of Physical Properties: -Color -Mass -Volume -Density -Melting Point -Boiling Point -Odor

4. Examples of Chemical Properties: -Flammability -Oxidation -Reacts with Acids -Reacts with Bases -Reacts with Water -Toxicity

5. Changes in Matter Physical – no new substance is formed Chemical – one or more new substances are formed

6. Indicators of Chemical Change Precipitate - Solid forms. Gas Formation - Gas/bubbles form Color Change - Color changes Energy Change - Creates heat or light Odor Changes - Smell becomes different (Don't forget to waft.) Alone these don’t always indicate a chemical change has occurred the true test is have new substances formed

7. How Many States of Matter?

8. There are 4!! Solid – has a definite shape and a definite volume

9. Liquid : has a definite volume but no definite shape

10. Gas: has no definite shape or volume and is easily compressible

11. Three Phases of Matter Solid – Liquid – Gas

12. Three States of Matter Solid – Liquid – Gas Why is water different from most substances in the solid phase?

13. Plasma: The Fourth State of Matter - the most abundant in the universe - ionized gases

14. Pure Substances Elements – simplest form of matter which consist of only one type of atom

15. Pure Substances Compounds – can only be separated by chemical reactions – consist of two or more types of atoms chemically combined Salt Water

16. Mixtures: A physical blend of two or more substances which can be separated by physical means

17. Heterogeneous Mixture Not uniform composition Sand

18. Homogeneous Mixture Uniform composition – evenly mixed – single phase Solutions

19. Not all solutions are alike: Can you think of an example of - Solution of a gas in a liquid - Solution of a solid in a liquid - Solution of a liquid in a liquid - Solution of a solid in a solid So what defines a solution?????

20. Law of Conservation of Mass In any chemical or physical change matter is neither created or destroyed 2H 2(g) + O 2(g)  2H 2 O (l)