Intro to Plate Tectonics

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Presentation transcript:

Intro to Plate Tectonics Layers of the Earth

Earth’s Interior Two ways of looking at Earth’s layers: chemical properties (what minerals are there) physical properties (how the minerals behave: solid, liquid, etc.)

Earth’s Interior, CHEMICALLY Crust (1 and 2) ex: granite and basalt Mantle (3 and 4) more presence of iron and magnesium Core (5 and 6) mostly iron, other metals source of Earth’s magnetic field

Earth’s Interior, PHYSICALLY Lithosphere (1, 2, and upper 3) rigid, the so-called “plates” Asthenosphere (lower 3) partially molten, can flow over long periods Liquid Mantle (4) conducts heat from the core outwards