Structure of the Earth

HideShow resource information
  • Created by: Lotto65
  • Created on: 12-12-15 16:00
What is the centre of the Earth called?
The core
1 of 18
What is the centre of the Earth made of?
Solid iron and nickel
2 of 18
What is around the core in the Earth?
The mantle
3 of 18
What is the mantle made of?
Semi-molten rock
4 of 18
How fast does the mantle move?
Very slowly
5 of 18
What is the outer layer of the Earth called?
The crust
6 of 18
Give two types of crust
Oceanic crust and Continental crust
7 of 18
How thick is the crust?
Quite thin- 20km
8 of 18
What is crust divided into?
Tectonic plates
9 of 18
Are tectonic plates all the same size?
No- they vary in size
10 of 18
How is crust positioned on the mantle?
It floats on top
11 of 18
What is a plate margin?
The join where two plates meet
12 of 18
What causes the plates to move?
Convection currents within the mantle
13 of 18
What is a convection current?
The circular currents of heat in the mantle
14 of 18
How dense is the mantle?
Quite dense
15 of 18
Give some characteristics of oceanic crust?
New- 200 million years old; Dense; Can sink; Can be created and destroyed; Thinner that continental crust
16 of 18
Give some characteristics of continental crust?
Old- 1500 million years; Less dense; Cannot sink; Cannot be created or destroyed; Thicker than oceanic crust
17 of 18
Give the four layers in the Earth
Inner core, outer core, mantle, crust
18 of 18

Other cards in this set

Card 2

Front

What is the centre of the Earth made of?

Back

Solid iron and nickel

Card 3

Front

What is around the core in the Earth?

Back

Preview of the front of card 3

Card 4

Front

What is the mantle made of?

Back

Preview of the front of card 4

Card 5

Front

How fast does the mantle move?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Tectonics resources »