1. Minerals
A. can be liquids B. are organic
C. are inorganic D. have no crystal structure
2. is a measure of how easily a...
ReviewReview
Minerals
Identifying
minerals
Igneous RocksIgneous Rocks
Rocks
formed
from
melted
minerals
Igneous RocksIgneous Rocks
Some have crystals
Slow cooling =
“large” crystals
–Granite
Granite
Igneous RocksIgneous Rocks
Fast cooling =
“small” crystals -
Basalt
Basalt
Granite Basalt
Igneous RocksIgneous Rocks
Extra fast cooling
= no crystals
Obsidian: Volcanic, “Glassy”
Pumice: Volcanic, “Frothy”Pumice: Volcanic, “Frothy”
Krakatoa Island 1883
Pumice: Volcanic, “Frothy”
Mt. St. Helens 1980
Igneous Rocks
Igneous Rocks
Igneous Rocks
Igneous Rocks
Igneous Rocks
Igneous Rocks
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Igneous Rocks

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Igneous Rocks

  1. 1. 1. Minerals A. can be liquids B. are organic C. are inorganic D. have no crystal structure 2. is a measure of how easily a mineral is scratched. A. luster B. cleavage C. hardness D. fracture 3. The color of a minerals powder on an unglazed porcelain tile is . A. luster B. hardness C. density D. streak 4. When halite breaks it displays . A. fracture B. cleavage C. luster D. crystal form 5. Halite forms crystals. A. triclinic B. monoclinic C. hexagonal D. cubic
  2. 2. ReviewReview Minerals Identifying minerals
  3. 3. Igneous RocksIgneous Rocks Rocks formed from melted minerals
  4. 4. Igneous RocksIgneous Rocks Some have crystals Slow cooling = “large” crystals –Granite
  5. 5. Granite
  6. 6. Igneous RocksIgneous Rocks Fast cooling = “small” crystals - Basalt
  7. 7. Basalt
  8. 8. Granite Basalt
  9. 9. Igneous RocksIgneous Rocks Extra fast cooling = no crystals
  10. 10. Obsidian: Volcanic, “Glassy”
  11. 11. Pumice: Volcanic, “Frothy”Pumice: Volcanic, “Frothy”
  12. 12. Krakatoa Island 1883
  13. 13. Pumice: Volcanic, “Frothy”
  14. 14. Mt. St. Helens 1980

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