Intro to Tectonic Plates
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The document discusses the layers of the Earth from the inner core to the crust, including the types of crust. It then explains that tectonic plates move due to convection currents in the mantle, with hot rock rising and cool rock sinking. There are three types of plate boundaries: convergent where plates move toward each other, divergent where they move apart, and transform where they scrape past each other. Hot spots in plates are used to track their movements over time.
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Intro to Tectonic Plates
- 2. Let’s Review Layers of the earth from inside to outside - Inner Core - Outer Core - Mantle - Crust Types of Crust - Oceanic - Continental
- 3. What Causes Plate Movement? Tectonic plates are “driven” by the mantle. Convection – “boiling water” Convection Current - hot, soft rock rises – cools – sinks – heated again – rises again
- 5. Types of Plate Boundaries Convergent – plates moving toward each other – “converging” Divergent – plates moving away from each other – “dividing” Transform – plates scraping past each other – “transferring” http://player.discoveryeducation.com/index.cfm?guidAssetId=5c04739f-f083-44b6-8351-20bd8a98211a&productCode=HUB
- 7. Hot Spots Used to track plate movements Volcanoes usually form here Usually occur in the middle of the plate Hawaiian Islands Video