ES + 1. Layers of the Earth

Question 1

What are the compositional layers of the earth interior?

Answer 1

Crust, Mantle, Core

Question 2

Crust:
- State of Matter?
- Composition?
- Thickness?
- Temperature?

Answer 2

• Solid
• Rigid rock outer layer that can break under stress, Made out of Oceanic and Continental Crust
• 5-70km
• 0-900C

Question 2

How many layers is the Earth composed of?

Answer 2

4, Crust, Mantle, Outer Core, Inner Core

Question 3

Asthenosphere:
- State of Matter?
- Composition?
- Thickness?
- Temperature?

Answer 3

-Semi-solid fluid layer
- partially molten rock, which allows this layer to flow very slowly. Acts as a lubricant for tectonic plates to slide on
- 440 km
- 1700 C

Question 4

Mantle:
- State of Matter?
- Composition?
- Thickness?
- Temperature?

Answer 4

• Solid rock but can move due to plasticity
• Heavy rocks rich in iron magnesium and silicon
  -2900km , 80%
• 900-3700

Question 5

Outer Core:
- State of Matter?
- Composition?
- Thickness?
- Temperature?

Answer 5

• Liquid
• Molten Iron and Nickel
• 2270km
• 3700-4300 C
• 4400 - 6000

Question 6

Inner Core:
- State of Matter?
- Composition?
- Thickness?
- Temperature?

Answer 6

• Solid (due to pressure)
• Solid Iron and Nickel (compact)
• 1200 Km
• 5200-6000 C
• 6000 - 8000

Question 7

Lithosphere:
- State of Matter?
- Composition?
- Thickness?
- Temperature?

Answer 7

• Solid
• Crust and uppermost part of the mantle, contains tectonics plates
• 100km
• 0 - 900C

Question 8

Why is the inner core solid?

Answer 8

If the pressure is to high they will compress