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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
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
Igneous Rocks
Igneous Rocks
Pumice: Volcanic, “Frothy”
Igneous Rocks
Igneous Rocks
Igneous Rocks
Mt. St. Helens 1980
Igneous Rocks

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