Tectonic plates

At the end of this activity, students should be able to:
– say what tectonic plates are and describe their properties
– explain why tectonic plates shift
– explain what happens in places where the edges of tectonic plates meet
– describe what divergent, convergent and transform boundaries are
– give evidence for the expansion of the ocean floor
– present the evidence for the changes in the Earth’s magnetic field in the past
– say how continents move
– give the evidence for continental drift.