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Transcript
Through time, scientists have built a __________ of what Earth’s __________ is like. They base their model on __________ from ______ samples and __________ waves released by ____________________. Earth’s interior is __________ into __________. The • A ___________layer of ___________ rock • Includes ______ _________and __________ floor • Thickest part is _______________ (_______________) • Thinnest part is _______________ crust The • Made of rock that is very _______ but ___________. • It is divided into ____________ layers: 1• ___________ part of the ____________ and the _____________form this layer together. • It is “____________” (stiff/solid) 2• Has increased _____________ and ____________ • Described as being “______________” It is _______ & can _________, but is still __________ 3Mantle • ____________ material all the way to the core The • The ____________ portion of the Earth • Divided into __________ layers 1Core • ____________ (____________) metal • _____________ in the liquid may create Earth’s ________________ field 2Core • It is a ___________ ball of solid __________ 79 Through time, scientists have built a model of what Earth’s interior is like. They base their model on evidence from rock samples and seismic waves released by earthquakes. Earth’s interior is divided into layers. The Crust • A thin layer of solid rock • Includes dry land and ocean floor • Thickest part is continents (mountains) • Thinnest part is oceanic crust Lithos = “stone” Asthenos = “weak” Convection currents happen here Mostly iron and nickle The Mantle • Made of rock that is very hot but solid. • It is divided into three layers: 1- Lithosphere • Upper part of the mantle and the crust form this layer together. • It is “rigid” (stiff/solid) 2- Asthenosphere • Has increased temperature and pressure • Described as being “plastic” It is soft & can flow, but is still solid 3- Lower Mantle • Solid material all the way to the core The Core • The center portion of the Earth • Divided into two layers 1- Outer Core • Molten (liquid) metal • Currents in the liquid may create Earth’s magnetic field 2- Inner Core • It is a dense ball of solid metal 79