Earths Interior Layers of the Earth How much

Earth’s Interior Layers of the Earth How much do you know about your planet? Text Book page numbers 80 - 87

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)

Is Earth’s surface constantly changing? Yes. Example : Mount Kilauea in Hawaii - an active volcano • http: //www. discovery. com/tv-shows/discovery-presents/videos/understanding-volcanoes-kilauea -a-volcano-lab/

Crust • The layer of rock that forms Earth’s outer surface. • The crust is up to 32 Kilometers (20 miles - here to Stone Mountain) thick. • The crust is made up of the continents and the ocean floor. • The crust is thickest under high mountains and thinnest beneath the ocean. • The continental crust consists of rocks such as granite, sandstone, and marble. The oceanic crust consists of basalt. • 0 degrees Fahrenheit to 1590 degrees Fahrenheit • The crust’s density and temperature increase with it’s depth.

Oceanic Crust Continental Crust

Lithosphere • A rigid layer made up of the uppermost part of the mantle and the crust. • 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 layer of hot, solid material between Earth’s crust and core. • The mantle is the layer under the crust. • It is up to 2, 897 kilometers(1, 800 miles -from here to Arizona) thick. • The mantle is made up of rocks such as silicon, aluminum, iron, and magnesium. • Top layer - hot solid rock 1590 degrees Fahrenheit • Bottom layer - hot liquid rock 3992 degrees Fahrenheit • The Mantle’s density and temperature increase with it’s depth.

Asthenosphere • Asthenes (GREEK) means weak • The plastic like layer below the lithosphere is the asthenosphere • This is the soft layer of the mantle on which the lithosphere floats

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.