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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?. Salt. Pepper.
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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? Salt Pepper ` 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. Sand Iron Fillings
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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