The earliest scientists first observed the waves that earthquakes produce before they could accurately describe the nature of earthquakes or their fundamental causes, as discussed in Lessons 1–5.

Check to see what you've learned here by taking the tsunami quiz. Start with page one of Lesson 1: The Nature of Waves. Can you identify anything you see or do daily that relates to a type of wave?

Save guides, add subjects and pick up where you left off with your BBC account. Electromagnetic waves travel at 300,000,000 metres per second (m/s) through a vacuum. Often a phrase is used to help ...