Layers Of Earth By: Alayna Snow

Crust

Crust: In geology, the crust is the outermost solid shell of a rocky planet or natural satellite, which is chemically distinct from the underlying mantle.

Mantle

Mantle: In geology, the crust is the outermost solid shell of a rocky planet or natural satellite, which is chemically distinct from the underlying result for mantle.

Outer Core

Outer Core: The outer core of the Earth is a fluid layer about 2,300 km (1,400 mi) thick and composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle.

inner core

Inner Core: The Earth's inner core is the Earth's innermost part and according to seismological studies, it has been believed to be primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 70% of the Moon's radius.

Continental Crust

Continental Crust: The relatively thick part of the earth's crust that forms the large landmasses. It is generally older and more complex than the oceanic crust.

Oceanic Crust

Oceanic Crust: Oceanic crust is the uppermost layer of the oceanic portion of a tectonic plate.

Lithosphere

Lithosphere: the rigid outer part of the earth, consisting of the crust and upper mantle.

Asthenosphere

Asthenosphere: the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.

Convection Currents in the Mantle

Convection Currents in the Mantle: Convection currents in the magma drive plate tectonics. Heat generated from the radioactive decay of elements deep in the interior of the Earth creates magma (molten rock) in the aesthenosphere. The aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the Earth that extends to 2900 km.

Ice Caps on the North and South Pole

Ice Caps on the North and South Pole: A polar ice cap or polar cap is a high-latitude region of a planet, dwarf planet, or natural satellite that is covered in.

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