1.
Student to describe what is happening relate back to last lesson link with the structure asthenosphere and lithosphere

2. How the Earth’s surface moves
By the end of today’s lesson all of you will:
Identify evidence to prove continental drift
Know how the tectonic plates move
Know what happens when convection currents rise or fall.
Some of you will:
Understand how density and viscosity affects plate movement.
Key terms: Convection currents, tectonic plates, plate boundaries. Continental drift

3. Today I am looking for:
Good collaboration
Clear communication – in written and verbal form.

4. Starter – True or False False
The lithosphere consists of the Crust and upper mantle and is divided into tectonic plates. Convection currents are driven by the heat from the earths core Heat and pressure cause stress in the crust and it breaks up Basaltic rocks are less dense than granitic rocks The heat in the core is due to the pressure of overlying material and radioactivity
True
True
True
False
Ensure students know why. Use this slide to answer the question How do tectonic plates move?
True

5. 250 million years ago Evidence
Position 250 ml years ago what is evidence all joined as Pangea Wegner continental drift

6. Evidence

7. Glacial deposits found at equator Coral reefs in Antarctica
Same rocks found across
ocean basins
Termination of mountain chains
Glacial deposits found at
equator
Coral reefs in Antarctica
Any other evidence? Last evidence flies in

8.
Explain plate movemtn
In pairs look at Figure 2 and in pairs explain to each other why the convection currents rise and why they fall back again.
In books answer the following
identify two processes that create convection currents (overlying material and radioactivity at the core). Discuss the responses.
what might happen when a convection current rises and what is likely to happen when it sinks. By using Figure 2, students should be able to identify the features with which rising and falling convection currents are associated. (This could be illustrated using a lava lamp.)
2)The creation of new crust takes place where rising convection currents are found. What else must be happening if new crust is being formed?. Ask them to complete Activity 1 on next slide to distinguish between different types of crustal material.

9. (5 marks)
Pupils to complete answer and self assess from next slide

10. Answer – swap books peer assess
Continental rocks are lower in density (1 mark) and, having cooled slowly below the surface (1 mark), are made up of larger crystals (1 mark)of minerals such as quartz and feldspar (1 mark). The oceanic crust is denser (1 mark) and finer grained (1 mark), having cooled more rapidly on the surface (1 mark).
Now self assess your own learning WWW/ EBI

11. What is happening at these plate boundaries in relation to convection currents kinesthetic RISING FALLING point and name boundary pupils to to the correct poster
Conservative margin

12. Homework On VLE >geography>GCSE geography>restless earth > lesson 2 > A-C 0r foundation 2 homeworks

13. Rising

14. Falling