Why do we have oceanic and continental crust Using your data from yesterdays lab construct a diagram that depicts the differences in oceanic and continental crust as it relates to sinking and floating in ID: 551853
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Slide1
Daily Science
Why do we have oceanic and continental crust?
Using your data from yesterdays lab, construct a diagram that depicts the differences in oceanic and continental crust as it relates to sinking and floating in
the mantleSlide2
Minerals
Pg. 33Slide3
Mineral
A naturally occurring, inorganic solid compound with a specific chemical composition and a definite crystalline structure.Slide4
Break it down (What is a mineral)
Naturally occurring- formed in nature, not in a lab.
Inorganic- not living/never alive
Compound- can’t be physically separated
Ex. Salt is a mineral while sugar is not.Slide5
Break it down (cont)
Specific chemical structure- must be a solid
Each mineral has a unique chemical make up
Ex. Quartz- SiO
2
Slide6
Break it down (cont)
Crystalline structure- regular geometric patterns that are repeated again and again
Crystal- solid arranged in repeating patternsSlide7
Crystal systems
Cubic
Tetragonal
Hexagonal
Orthorhombic
Monoclinic
TriclinicSlide8
Examples
Cubic (Pyrite)
Tetragonal (Wulfenite)
Hexagonal (
Pyromorphite
)
Orthorhombic (Topaz)
Monoclinic (Gypsum)
Triclinic (Feldspar)Slide9
Mineral Formation
From magma- molten material found beneath Earth’s surface rises and cools
Small crystals form from rapidly cooling magma
Large crystals form from slowly cooling magma
From solutions- if a solution becomes over saturated, mineral crystals begin to precipitate.
When liquid evaporates, solids formSlide10
Mineral Groups
3000 minerals are found in Earth’s Crust
Silicates- minerals that contain oxygen, silicon, and usually one other element (make up 96% of minerals)
Carbonates- composed of one or more metallic elements w/ a carbonate compound (CO
3
)
Oxides- oxygen and a metalSlide11
Pg. 34
Use the following terms to construct a concept map of the six major crystal systems.
Gypsum
Topaz
Pyrite
Triclinic
Cubic
Hexagonal
Tetragonal
Crystal systems
Wulfenite
Pyromorphite
Feldspar
Orthorhombic
monoclinic