| A | B |
|---|
| continental drift | continents used to be connected in a single landmass 200 million years ago, and have slowly moved to their position |
| Alfred Wegener | suggested the idea of continental drift |
| pangaea | name of the supercontinent landmass that existed 250 million years ago |
| Mesosaurus | a swimming reptile that was found on South America and Africa |
| Glossopteris | a fossilized plant that was found on many different continents |
| glaciers | proved that places used to be colder because of the scars that were left |
| rock clues | this clue told us that mountains used to be connected on Africa, North America, Greenland, and Europe |
| sound waves | this is what submarines use to map the ocean floor |
| mid-ocean ridges | underwater mountain ridges |
| Harry Hess | suggested that the seafloor is spreading |
| magnetic field | causes materials in rocks to align in certain ways |
