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Minerals and Rocks

Minerals and Rocks. Standard/Objective: S6E5.b. Investigate the contribution of minerals to rock composition. EQ: What are rocks made of?. minerals. Minerals are not made by people; they are …. …naturally occurring substances. What is a mineral?. Naturally occurring (No human input)

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Minerals and Rocks

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  1. Minerals and Rocks Standard/Objective: S6E5.b. Investigate the contribution of minerals to rock composition. .

  2. EQ: What are rocks made of? minerals

  3. Minerals are not made by people; they are … …naturally occurring substances.

  4. What is a mineral? • Naturally occurring (No human input) • Non-organic (they are not made by life processes) • Characteristic chemical composition • Distinctive physical properties • Crystalline structure

  5. Name four properties (or clues) that scientists use to identify minerals. Color, luster, streak, and hardness

  6. Which property means the way the light bounces off the mineral? luster

  7. Luster:How minerals reflect light

  8. What words can be used to describe a mineral’s luster? Glassy, dull, shiny, greasy

  9. Why is color not a good property to use to identify a mineral? limestone slate Many minerals have the same color.

  10. Cleavage & Fracture • Cleavage: planes of weakness along which minerals can break • Fracture: surfaces along which minerals can break

  11. Cleavage & Fracture Best identified on a fracture surface

  12. Streak: • The powdered form of a mineral

  13. fingernail, penny, nail What are three testers that can be used to determine a mineral’s hardness?

  14. HardnessBased on Moh’s scale of hardness

  15. Find the Definition for the following vocabulary word in the Text. • Mineral-Naturally occurring inorganic solid that has a definite chemical composition and an orderly internal atomic structure. • Crystal- solid in which the atoms are arranged in orderly , repeating pattern. • Silicate- minerals that contain silicon and oxygen and usually one or more other elements • Hardness-Measure oh how easily a mineral can be scratched • Luster-describes the way a mineral reflects light from its surface; can be metallic or nonmetallic • Streak-color of a mineral when it is in powdered from. • Cleavage- minerals that break along smooth, flat surfaces • Fracture- minerals that break with uneven, rough or jagged surfaces • Specific gravity- the ratio of its weight compared with the weight of an equal volume of water.

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