1. Key Question 3: The ‘Big’ Ideas in Geology
Idea One- The Rock Cycle
Idea Two- Plate Tectonics
Idea Three- Global sea/ temperature changes

2. Key Question 3: The ‘Big’ Ideas in Geology
Idea One- The Rock Cycle
Idea Two- Plate Tectonics
Idea Three- Global sea/ temperature changes

3. Plate Tectonics
Key Question: How does the structure of the Earth allow plate tectonics?
Key Words:
Lithosphere
Asthenosphere
Mantle
Core
Plate Boundaries
HW: Find out how Alfred Wegner realised the continents had moved.

4. 1 minute to come up with an answer…..
To Start…..
What has an egg got to do with Earth Structure?
In Pairs
1 minute to come up with an answer…..

5. Why is earth like an egg (analogy)?
Core
1. What is the state of each?
Crust
2. What is the composition of each?
Mantle

6. Now complete this table
Egg Analogy is….
Good at showing
Bad at showing
The thickness of the crust relative to its surface area
The relative size of the 3 main (compositional) layers
The state of the core
The state of the mantle
The state of the crust
Extension: Is there anything this model does not show?

7. Earth Structure

8. Earth Structure
CONTINENTAL CRUST
OCEANIC CRUST
Continental crust -“Granitic”
Oceanic crust - “Basaltic”
CRUST
CRUST
Peridotite (olivine & augite)
MANTLE
MANTLE
Iron & Nickel
CORE
CORE
This is a compositional layering of the Earth i.e. by what material the layers are made of.

9. Earth Structure
CRUST
solid (cool, brittle & rocky)
LITHOSPHERE
partially molten (only 1-5% molten)
ASTHENOSPHERE
MANTLE
MESOSPHERE
solid (solid-state convection)
liquid
OUTER CORE
CORE
INNER CORE
solid
This is a mechanical layering of the Earth i.e. by what properties the layers have.

10. Earth Structure
Crust
Mantle
Core
Compositional

11. Compositional Mechanical Crust Lithosphere Asthenosphere Mantle
Earth Structure
Crust
Lithosphere
Asthenosphere
Mantle
Mesosphere
Outer Core
Core
Inner Core
Compositional
Mechanical

12. LITHOSPHERE ASTHENOSPHERE Characteristics of Plates CONTINENTAL CRUST
OCEANIC CRUST
UPPER MANTLE
SEMI-SOLID (MOBILE)
ASTHENOSPHERE
MANTLE

13. LITHOSPHERE ASTHENOSPHERE Characteristics of Plates CONTINENTAL CRUST
OCEANIC CRUST
LITHOSPHERE
OCEANIC CRUST
UPPER MANTLE
UPPER MANTLE
SEMI-SOLID (MOBILE)
SEMI-SOLID (MOBILE)
ASTHENOSPHERE
MANTLE
MANTLE

14. Continental Plate Oceanic Plate PLATES
Characteristics of Plates
Continental Plate
Oceanic Plate
CONTINENTAL CRUST
PLATES
OCEANIC CRUST
UPPER MANTLE
OCEANIC CRUST
UPPER MANTLE
SEMI-SOLID (MOBILE)
SEMI-SOLID (MOBILE)
ASTHENOSPHERE
MANTLE
MANTLE

15. Cut out your tectonic map rearrange it and stick it in your book?