Layers of the Earth How much do you know about your planet?
True or False The Earth is made up of 3 layers. Answer: False 4 Layers The Crust is the thickest layer. Answer: False Mantle The Inner Core is solid. Answer: True The Mantle has liquid rock. Answer: True (so does the Outer Core)
Crust • The crust is the outer most layer. Where we walk and live. • The crust is up to 32 Kilometers (20 miles - here to ATL) thick. • The crust is made up of the continents and the ocean floor. • The continental crust consists of rocks such as granite, sandstone, and marble. • The oceanic crust is made of basalt. • The crust’s density increases with it’s depth.
Lithosphere • There are two kinds of crust: continental and oceanic. Yes, there is even crust under the ocean! • The lithosphere (geosphere) is the "solid" part of Earth • It has two parts, the crust and the upper mantle.
Mantle • The mantle is the layer under the crust. • The mantle is made up of several layers: Top layer - hot solid rock Bottom layer - hot liquid rock • It is up to 2,897 kilometers(1,800 miles -from here to Arizona) thick. • The mantle is made up silicon, aluminum, iron, and magnesium.
Outer Core • The outer core is 2253 kilometers (1,400 miles - here to New Mexico) thick. • The temperature ranges from 2204 – 4982 degrees Celsius (4000 – 9000 degrees Fahrenheit) • Made up of the hot liquid metals iron and nickel.
Inner Core • The very center of the earth • 800 miles thick – From here to Dallas, TX • Made of the metals iron and nickel • The inner core is very hot, about 4982 degrees celsius (9000 degrees fahrenheit) • The inner core is solid. It is under so much pressure from the layers above that the metal cannot spread out and become liquid.