Spheres

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The Earth's Spheres

lithosphere (land)

hydrosphere (water)

biosphere (living things)

atmosphere (air

+ geosphere (totality of the planet)

Physical Layers of the Geosphere

Lithosphere

crust and uppermost mantle

consists of tectonic plates

Asthenosphere

mantle rock that moves slowly

Allows tectonic plates to move

Mesosphere

the lowest part of the mantle

Outer core