1.7 Earth's Structure

Question 1

Lithosphere (Continental Crust)

Answer 1

30 - 40km thick. We live on it. Less dense than the ocean. Mainly silicon based rock. Average 25°C

Question 2

Lithosphere (Oceanic Crust)

Answer 2

5 - 8km thick. Liquid state. Made of water (H2O). Average 10 - 900°C

Question 3

Asthenosphere (Mantle)

Answer 3

A mobile layer in upper mantle. Quite dense. Semi - molten state. Silicon mainly. 1300°C

Question 4

Lower Mantle

Answer 4

Moves the tectonic plates. Semi - molten. Silicon based rocks. 1600 - 3700°C

Question 5

Outer Core

Answer 5

Liquid iron + nickel. Dense. Liquid state. 4000 - 5700°C

Question 6

Lithosphere + Asthenosphere

Answer 6

The difference between these two is that the lithosphere is the oceanic crust, while the asthenosphere is part of the mantle