| A | B |
|---|
| Alfred Waegener | proposed theory of Continental Drif |
| fault | break in Earth's crust where rocks have slipped past each other |
| radiation | transfer of enery through empty space |
| granite | contiental crust consists mainly of this rock |
| geologists | study the forces that make and shape the Earth |
| subduction | process where oceanic crust sinks beneath the trenches |
| plates | Earth's lithosphere broken into sections |
| molten material | erupts through the valley of the mid-ocean ridge |
| lithosphere | all of the crust and part of the mantle |
| convection | heat transfer by the movement of a heated fluid |
| density | measure of how much mass ther is in a volume of a substance |
| transform boundary | place where two plates slip past each other |
| asthenosphere | part of the mantle that can bend like plastic |
| pangaea | supercontinent |
| divergent | rift valley forms along this on land |
| sea floor spreading | process that continually adds new material to the ocean follor |
| continental drift | fossils of tropical plants founhd on an island in the Arctic Ocean are evidence for this theory |
