Plate Tectonics and Rocks Revision

Briefly outline the evidence for plate tectonics.

Describe how a convection current works. How does it help explain the theory of plate tectonics?

What happens at a mid-ocean ridge and a subduction zone?

Briefly explain what is meant by paleomagnetism and sea-floor spreading.

Describe the main characteristics of mid-ocean ridges and subduction zones.

Compare and contrast the formation of the Andes and the formation of the Himalayas.

Describe the main features of an island arc system.

Briefly explain how island arcs are formed.

Explain how freeze-thaw weathering operates.

Comment on the resistance to weathering compared with the pressure exerted by ice when it expands.