michaels+earth+interior

= The earths interior =

==== The crust: is the outer layer of the earth.Sort of like the earths skin.The crust is the place where we live.The earths crust is also a large layer of rock that forms the earths outer skin.it is thickest under mountains and is the thinnest at the ocean floor.the crust is 5-40 kilometers or 70 beneath mountains. the crust beneath the ocean is oceanic crust,it is made of basalt. the crust on the surface is continental crust,it is mainly made of granite.it is also solid.it is also the layer of solid rock that includes both dry land and the ocean floor.on the crust you can also find rocks and mountains. ====

==== The mantle: the mantle is a layer of hot rock.it is made of different layers.Its thickness is 5-70 kilometers.the composition is silicon,oxygen,iron,and magnesium.There are also different parts of the mantle. One part is the upper mantle.another is the middle mantle where there are convection currents.Finally there is the lower mantle. ====

The asthenosphere : Is a layer of rock that bends like plastic but is very hard.it also feels like hot tar heated by the sun.
==== The core: Is a very dense metallic ball of solid metal.The core is mostly made iron and nickel.it is made of 2 parts a liquid outer core and a solid inner core.Together they are 3,487 kilometers thick. ====