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MINERALS - PowerPoint PPT Presentation


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MINERALS. WHAT ARE THEY??. MINERALS. The basic materials of the earth’s crust. The “building blocks” of rocks Thousands are known But only about 20 are common in the crust – these are the rock-forming minerals. WHAT MAKES SOMETHING A MINERAL??. 4 THINGS NEEDED:.

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MINERALS


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    1. MINERALS • WHAT ARE THEY??

    2. MINERALS • The basic materials of the earth’s crust. • The “building blocks” of rocks • Thousands are known • But only about 20 are common in the crust – these are the rock-forming minerals.

    3. WHAT MAKES SOMETHING A MINERAL?? 4 THINGS NEEDED: • Must be “inorganic” – not made from living (or once-living) things. • Must occur naturally (not made by people). • Must be a solid, “crystalline” material. • Must have a “definite chemical composition”.

    4. For example – Here’s a piece of granite rock, and the three minerals that it is made of.

    5. COAL CONCRETE GOLD STEEL SALT (HALITE) OIL SO – WHICH OF THESE ARE MINERALS?

    6. COAL CONCRETE GOLD STEEL SALT (HALITE) OIL SO – WHICH OF THESE ARE MINERALS? NO!! NO!! YES!! NO!! YES!! NO!!

    7. mica quartz feldspar silver gypsum pyrite TWO MAIN GROUPS OF MINERALS • SILICATES (96%) Contain silicon (Si) and oxygen (O), plus other elements, usually • NON-SILICATES (4%) 6 major groups – see pp. 158-159

    8. USES OF MINERALS WE IDENTIFIED

    9. USES OF MINERALS WE IDENTIFIED