Layers of the Earth.

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Presentation transcript:

Layers of the Earth

The Inner Core The inner core is shaped like a ball. Scientists think it is solid metal and that its temperature reaches 9,000 degrees. The distance from the edge of the inner core to its center is about 800 miles.

The Outer Core The outer core is made up of melted metals. It is hotter than the mantle. This layer is about 1,400 miles thick.

The Mantle The mantle is a layer of solid rock. Many scientists think that it also contains partly melted rock. The mantle is about 1,800 miles thick. It is very hot and under great pressure.

The Crust The earth’s crust is made up of sedimentary, igneous, and metamorphic rocks. The thickness of the crust varies from about 5 to 20 miles. Most of the crust’s surface is covered by oceans.