Monday, November 30, 2009

IGCSE Tectonic Processes Revision

There will be a test next week on everything that we have covered on Tectonic processes, so to ensure that you arent going to panic too much here is a revision checklist.

Key Terms
Constructive Boundary (Divergent)
- where two plates move away from each other resulting in new crust being formed.
Destructive Boundary (Convergent) - where two plates move towards each other - in the case of a plate consisting of continental crust meeting a plate consisting of oceanic crust, the oceanic crust will be subducted and destroyed as it is less dense.
Conservative Boundary - where two plates move alongside each other - although crust is neither created or destroyed here, earthquakes usually occur here.
Collision Boundary - where two plates of continental crust move towards each other creating fold mountains.
Volcano - a vent through which lava, ash etc. is erupted (often, but not always cone-shaped)
Earthquake - a sudden ground movement

The USGS is excellent for increasing your undesrstanding of all of the key terms.