Geography of Canada Mr. J. Brazeau Plate Tectonics.

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Presentation transcript:

Geography of Canada Mr. J. Brazeau Plate Tectonics

Planet Earth 1.Geologic History 2.Plate Tectonics 3.Earth’s Interior 4.Rock Cycle

Landform Regions in Canada

The World

Plate Tectonics - Continental Drift

Antarctica THE CONTINENTS TODAY

Plate Tectonics - Continental Drift PROOF!

Global Hotspots Heat from the earth’s core forms convection currents They move the plates around the earth’s surface The currents cause the plates to move apart or come together When plates move apart magma rises through the open space and then cools, causing a ridge

Global Hotspots When they come together two things can happen: If they crash into each other they form a

Global Hotspots If one plate slides below another it creates a

Plate Tectonics Separating

Plate Tectonics Colliding

Earth’s Interior Crust km thick - cold & fragile Mantle km thick - hot & molten Outer Core km thick °C - liquid Inner Core km thick °C - solid Nickel and Iron Air Land Water LITHOSPHERE HYDROSPHEREATMOSPHERE

Rock Cycle MAGMA IGNEOUS SEDIMENTARY METAMORPHIC Cools and hardens Weathers, erodes, and deposits Stresses or heats Heats and melts

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