how is a rock like a salad?
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How is a rock like a salad?. Physical Properties of Minerals. Color Some minerals only occur as one c olor . However, some minerals, s uch as quartz can be many different colors. Hardness A measure of how easily a mineral can be scratched. Measured on a - PowerPoint PPT PresentationTRANSCRIPT
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How is a rock like a salad?
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Physical Properties of MineralsColorSome minerals only occur as onecolor. However, some minerals,such as quartz can be manydifferent colors.
StreakThe color of powdered mineral.Mineral is scraped across aceramic plate to create powder. Streak and color are NOT alwaysthe same (e.g., pyrite).
CleavageWhen a mineral breaks to form one or more flatsurfaces it is said to have cleavage(e.g., mica).
LusterDescribes the way a mineral reflects light from it’s surface.Either metallic or non-metallic.
HardnessA measure of how easily a mineralcan be scratched. Measured on aScale from 1 (softest) to 10 (hardest).
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Color
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Luster – metallic or non-metallic
Pyrite
A.
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Streak – the color of powdered rock
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Mineral Identification
Mineral A
Color:
Lustre:
Streak:
Answer
Mineral B
Color:
Lustre:
Streak:
Answer
Mineral C
Color:
Lustre:
Streak:
Answer
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The Rock Cycle: Rock Types and Processes
IGNEOUS ROCKFormed when magma coolsIntrusive – magma that cools VERY slowlyusually deep in the earths crustExtrusive – magma that cools VERY quicklyusually ejected from volcanoes
SEDIMENTARY ROCKFormed from pieces of solid materialsthat have been deposited on Earth’ssurface. The solid pieces start outas loose grains (e.g., sand) and are known as sediment but become cemented together to form solid rock
Weathering & Erosion
METAMORPHIC ROCKFormed when rock is exposed to tremendous heat andpressure. The rock is often deformed and the original mineral crystals and/or grains recrystallize to form NEWminerals
Burial
Melting
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Igneous RocksFormed from cooled magma
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Sedimentary RocksFormed from eroded sediment
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Metamorphic RocksFormed by heat and pressure