The Structure of Earth.

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Presentation transcript:

The Structure of Earth

CRUST The thinnest, outermost layer of the Earth Only about 30 km thick Made mostly of oxygen, silicon, and aluminum(easily broken) Least dense layer in Earth’s geosphere All life exists on this layer. Consists of land and ocean. The temperature of the crust typically varies; however the further down you dig through the crust, the temperature increases

MANTLE The dense, thick layer of rock just below the crust Earth’s thick middle layer made mostly of solid rock; makes it denser than the crust This layer is undergoes constant heat and pressure. Temperatures range between 680°f and 4532°f The heat and pressure causes rocks to move and bend within this layer About 2,900 km of a thick, dense layer of rock

CORE The inner most chemical layer Made of iron and nickel, in liquid form, no water Made up of molten lava It is about 3,430 km thick Temperatures typically around 3500-4300° f Scientists know this layer is made of liquid molten lava by studying what happens when earthquakes occur