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Rocks and Minerals

Rocks and Minerals

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Rocks and Minerals

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  1. Rocks and Minerals By: Brianna Shields January 21, 2005

  2. DO NOW • 1. Which group of planets have solid, rocky surfaces? • 2. Which object is a “dirty snowball” made of rock, dust and ice, that orbits the sun? • 3. What are the bowl shaped areas on the moon called?

  3. GOAL • To be able to distinguish between a rock and a mineral • To know the characteristics used to identify rocks and minerals

  4. Rock Hard substance made of one or more minerals Rocks vs. Minerals

  5. Mineral Occurs in nature Solid Definite chemical structure Crystal shape Rocks vs. Minerals

  6. VIDEO: Identifying Rocks • FOCUS QUESTION: • Name five simple properties or tests used to identify minerals

  7. VIDEO: Identifying Rocks

  8. Color DEF: observed coloration DETERMINED BY: Look at mineral Not always reliable Rocks vs. Minerals

  9. Luster DEF: way it reflects light off its surface DETERMINED BY: Observe mineral Metallic or nonmetallic Rocks vs. Minerals

  10. Hardness DEF: ability to resist being scratched DETERMINED BY: Rub against other minerals on hardness scale Rub on glass, steel nail or penny Rocks vs. Minerals

  11. MOH’s HARDNESS SCALE

  12. Streak DEF: color of powder scraped off DETERMINED BY: Rub on a porcelain tile Rocks vs. Minerals

  13. Density Click here for Density Simulator DEF: number of particles in a space DETERMINED BY: Mass / volume Never changes for a mineral Rocks vs. Minerals

  14. Crystal Shape DEF: shape of atoms in mineral when formed DETERMINED BY: Look at small bits of mineral Rocks vs. Minerals

  15. Crystal Shapes

  16. Cleavage or Fracture DEF: how mineral breaks (layers, jagged, smooth) DETERMINED BY: Break mineral (hammer or hands) Rocks vs. Minerals

  17. Other mineral properties Magnetic Magnetite Rocks vs. Minerals

  18. Other mineral properties Glows under UV light Fluorite, Calcite Rocks vs. Minerals

  19. Other mineral properties Tastes salty Halite Rocks vs. Minerals

  20. Other mineral properties Smells like rotten eggs Sulfur Rocks vs. Minerals

  21. Other mineral properties Fizzes in acid Calcite Rocks vs. Minerals

  22. Other mineral properties Radioactive Uraninite Rocks vs. Minerals

  23. What is the color of this sample? Yellow

  24. What is the color of this sample? Greenish

  25. What is the luster of this sample? Metallic

  26. What is the luster of this sample? Nonmetallic

  27. According to the hardness scale, which minerals are harder than Topaz? Corundum & Diamond

  28. According to the hardness scale, which minerals are harder than diamond? None

  29. What is the color of the streak of this mineral? White

  30. What property of minerals would this equipment most likely test? Hardness

  31. Describe the crystal shape of this mineral Cubic

  32. How can a mineral’s density be used to identify the mineral? Each mineral has a unique density that doesn't change

  33. Describe the cleavage or fracture of this mineral Cubic

  34. Describe the cleavage or fracture of this mineral Thin Sheets/ Peels

  35. Assessment • Click on the link below to learn about some common uses of minerals • Common Uses for Minerals

  36. Assessment • Look at the mineral you are given • Describe it’s: • Color • Luster • Hardness • Streak • Crystal Shape • Cleavage or Fracture • Other interesting characteristics