Earth's structure is composed of well defined layers with unique properties. The crust is the outer most layer that we live on. The crust fractures and moves around the Earth.

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Structure of the Earth

•  Layers: Crust, Mantle, Core

•  Properties of Each Layer

Plate Tectonics

• Theory of Plate Tectonics

• Plate Boundaries: Divergent, Convergent, Transform

Earthquakes and Volcanoes

• Continental Drift and Seafloor Spreading