1. Matter Anything that has mass and occupies space. There are two types of matter: -Pure substances -Mixtures

2. Pure Substance A single kind of matter that is pure and has a specific set of properties.

3. Pure Substances vs. Mixtures What’s the difference?

4. What’s in each Cup? ` 1. Observe the contents in each cup. 2. In your notebook list the substance(s) that you think are in cup #1 and cup #2. 3. Explain your answer. Pepper Salt Iron Fillings Sand

5. Mixtures Both cups represent a mixture. Can you decide which cup is a homogeneous mixture and which is a heterogeneous mixture? Explain.

6. Hint Heterogeneous - The prefixes: "hetero"- indicate difference. Homogeneous - The prefixes "homo"- indicate sameness. Can you give an example of each type of mixture?

7. Mixture A mixture can be physically separated into pure compounds or elements.

8. Let’s Try Some Water and Kool - aid

9. Heterogeneous or Homogeneous? Bread Smoke and air Cake batter Snickers bar Gatorade Glass of tea Glass of ice tea

10. Pure Substances Atoms Elements Compounds

11. Pure Substances Atoms- The basic particle from which all elements are made.

12. Pure Substance Element - A pure substance that cannot be broken down into other substances by chemical or physical means. Example:

13. Pure Substance Compound - A pure substance made of two or more elements chemically combined. Example: or

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