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Warm-Up September 4

Warm-Up September 4 . True or False Ice is a mineral. Explain your answer. True. It is a solid Specific chemical composition (H 2 0) Crystal structure (cubic) Naturally occurring (not made by man) Inorganic (never alive). Warm-Up September 5.

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Warm-Up September 4

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  1. Warm-Up September 4 True or False Ice is a mineral. Explain your answer. True. It is a solid Specific chemical composition (H20) Crystal structure (cubic) Naturally occurring (not made by man) Inorganic (never alive)

  2. Warm-Up September 5 metallic nonmetallic The mineral on the left has a ______ luster, the one on the right, a ___________ luster.

  3. MYP Unit Question: What’s a world without rocks? Area of Interaction:Human Ingenuity Learner Profile:Thinker Standard: Students will investigate the scientific view of how the earth’s surface is formed. Learning Target: Today I am learning about the properties of minerals because minerals are in everything around me. T

  4. Where are they now?

  5. Activator: Naica Crystal Cave – Mexico Work Session Properties of Minerals Notes (continued) View mineral specimens

  6. Properties of Minerals Geologists use characteristics to tell one mineral from another

  7. Mineral Properties we will study Luster Hardness Cleavage Streak

  8. Luster • Refers to the way light reflects from the surface of the mineral. • There are two types of luster - Metallic: looks like polished metal. • Nonmetallic:can be shiny or dull.

  9. Pyrite has metallic luster

  10. Quartz has nonmetallic luster

  11. Hardness • Is measured by how easy it is to scratch. • Geologists order the hardness by… Moh’s Hardness Scale

  12. If the reference mineral scratches your mineral, the reference mineral is harder than your mineral.

  13. Talc and Graphite are the softest • minerals and can be scratched by • a fingernail. Talc Graphite

  14. Gypsum is soft, it can be scratched by a fingernail.

  15. Calcite is soft, but a little harder because it cannot be scratched by a fingernail, but it can be scratched by a penny.

  16. Fluorite is harder. It can be scratched by a nail, but not a penny or fingernail.

  17. Diamonds are the hardest mineral, so it scratches every mineral.

  18. Cleavage/Fracture Cleavage - Some minerals split easily along a flat surface.

  19. Feldspar splits readily in two directions, always at or near right angles.

  20. Calcite and galena cleave in three directions. They are said to have three good cleavages.

  21. Fracture - an uneven break

  22. Streak The color of a mineral in powdered form. • Red chalk - red marks. • White chalk - white marks. • Not all minerals work this way.

  23. Gold • When gold is run across a streak plate it makes a yellowish-gold color.

  24. Pyrite or “Fool’s Gold” • When pyrite is run across a streak plate, it has a black or dark green streak. • fool’s gold.

  25. Hematite • Hematite’s color is grey, but its streak is red. • The mineral was named hematite because it looked like it was bleeding when it was taken across a streak plate.

  26. One mineral property we will not use… COLOR The least reliable.

  27. A mineral can be many different colors. Below is Mica.

  28. Fluoritehas many colors

  29. Many minerals can be the same color. Below are gold colored minerals. Which one is gold?

  30. The answer… None of them were real gold.

  31. Other properties

  32. Density – the ratio of the mass of a substance • to the volume of a substance. • How many atoms are in a specific amount of space. • Density = mass • volume

  33. Closing: Turn to your table partner and share as many of the “other properties” of minerals that you can.

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