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

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

Pure Substances vs. Mixtures What’s the difference?

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

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

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

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

Let’s Try Some Water and Kool - aid

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

Pure Substances Atoms Elements Compounds

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

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

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

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