Layers of the Earth

Layers of the Earth
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1. Crust the thin and solid outermost layer of the Earth above the
mantle

2. Mantle the layer of rock between the Earth's crust and core

3. core the central part of the Earth below the mantle

4. Continental crust Crust about 30km to 100km thick that makes up the con-
tinents

5. Oceanic Crust Crust about 5km to 7km thick that forms the ocean floors-
thinner or more dense than the continental crust

6. lithosphere made up of the crust and the upper part of the mantle
-solid, means stone or rock

7. asthenosphere the softer layer of the mantle on which the lithosphere
(tectonic plates) move
-made of solid rock that flows very slowly

8. mesosphere the strong, lower part of the mantle between the asthenos-
phere and the outer core
-means middle

9. outer core is the liquid layer of the Earth's core
made of the metals iron and nickel-
lies beneath the mantle and surrounds the inner core

10. inner core densest and hottest layer of the Earth
made of solid iron and nickel

11. tectonic plates pieces of the lithosphere that move around on top of the
asthenosphere

12. seismic waves waves produced by earthquakes, scientist use these
waves to calculate the density and thickness of the layers
of the Earth

13. density A property of matter representing the objects mass/vol-
ume
1/2