| A | B |
|---|
| earthquake | A trembling or a shaking movement of the Earth's surface |
| tsunami | a series of waves generated when water in a lake or the sea is rapidly displaced on a massive scale |
| amplitude | wave height |
| oceanographer | studies the earth's oceans |
| undersea earthquake | most common cause of tsunamis |
| Pacific Ring of Fire | most of the world's largest earthquakes occur here |
| plate tectonics | the theory of the earth's crust being made up of moving plates |
| verticle displacement | when the earth's crust moves upward |
| 2004 Indian Ocean Tsunami | Tsunami that killed over 350,000 people |
