Structure of the Earth 0.0 / 5 ? GeographyPlate tectonicsASWJEC Created by: JoHastingsCreated on: 18-04-18 13:33 What is the earth's crust? The earth's hard outer layer. 1 of 21 What is the earth's crust made of? Igneous, metamorphic and sedimentary rocks. 2 of 21 How thick is the earth's crust? It ranges from 5km to 70km thick. 3 of 21 What are the two types of crust? Continental and oceanic. 4 of 21 What does the lithosphere consist of? The crust and upper mantle. 5 of 21 How deep is the lithosphere? It extends to a depth of 100km. 6 of 21 What is the asthenosphere? The upper layer of the mantle, below the lithosphere. 7 of 21 What occurs in the asthenosphere? Convection. 8 of 21 How deep is the asthenosphere? Up to 60km deep in some places. 9 of 21 Where does the mesosphere lie? Below the lithosphere and asthenosphere, but above the outer core. 10 of 21 What is the mesosphere? A hot, semi-solid rock. 11 of 21 How thick is the mesosphere? Up to 2100km thick. 12 of 21 How much of the earth's volume does the mantle take up? 84%. 13 of 21 How thick is the mantle? 2900km. 14 of 21 What is the mantle made of? Magma, a semi-molten rock. 15 of 21 What does the outer core do? Surrounds the inner core. 16 of 21 What is the outer core? A liquid layer made of iron and nickel. 17 of 21 How hot is the outer core? 4000 degrees celcius. 18 of 21 What is the inner core? A solid made from iron and nickel. 19 of 21 How hot is the inner core? 5500 degrees celcius. 20 of 21 By how much does the inner core grow every year? 0.5mm. 21 of 21
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