| A | B |
|---|
| 1700s Geology | -continents were always in same place |
| 1900s Geology | -continents were once joined together |
| continental drift | -idea that continents slowly moved over Earth's surface |
| Alfred Wegener | -came up with continental drift theory |
| Wegener's hypothesis | -all continents were once joined together & have since drifted apart |
| Pangaea | -a supercontinent to describe when continents drifted all together |
| Pangaea | -"all lands" |
| fossil | -trace of ancient organism that has been preserved in rock |
| Glossopteris | -fossil of a fernlike plant Wegener used as evidence for his hypothesis |
| Mesosaurus | -fossil of freshwater reptile found and used to support Wegener's ideas |
| Lystrosaurus | -freshwater reptile fossil used to support Wegener's arguments |
