plate tectonics mr. skirbst earth science topic 26
TRANSCRIPT
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Plate Tectonics
Mr. SkirbstEarth Science
Topic 26
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Plate Tectonics
(lithospheric) plates
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Plate Tectonics
(lithospheric) plates(rock) slabs
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Plate Tectonics
(lithospheric) plates(rock) slabstectonics
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Plate Tectonics
(lithospheric) plates(rock) slabstectonics
movement
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Plate Tectonics
movement of rocky slabsacross the Earth
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Plate Tectonics
theory of continental drift
Alfred Wegener
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Plate Tectonics
Earth’s continents are “floating” from one place to another
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Plate Tectonics
Evidence from fossils
Glossopteris(found in S. Hemisphere)
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Plate Tectonics
Evidence from rocks
mountains, shapes, deposits
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Plate Tectonics
Evidence from sea-floor
sea-floor spreadingmid-ocean ridge
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Plate Tectonics
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Plate BoundariesDivergent boundary
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Plate BoundariesDivergent boundary
plates move apart
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Plate BoundariesDivergent boundary
plates move apartfound along mid-ocean ridges
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Plate BoundariesDivergent boundary
plates move apartfound along mid-ocean ridgescalled constructive boundary
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Plate BoundariesDivergent boundary
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Plate BoundariesConvergent boundary
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Plate BoundariesConvergent boundary
plates come together
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Plate BoundariesConvergent boundary
plates come togetherfound near trenches
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Plate BoundariesConvergent boundary
plates come togetherfound near trenchescalled destructive boundaries
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Plate BoundariesStrike-slip boundary
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Plate BoundariesStrike-slip boundary
grind horizontally
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Plate BoundariesStrike-slip boundary
grind horizontallyforms lateral faults
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Plate BoundariesStrike-slip boundary
grind horizontallyforms lateral faultscalled a conservative boundary
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Pangaea
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PangaeaLarge, single landmass that
existed in the past before slowly breaking apart and moving into the current position