| A | B |
|---|
| Plates | lithoshere |
| asthenoshere | plastic like layer |
| convergent boundary | plates collide |
| divergent boundary | plates move apart |
| transform boundary | San Andres Fault |
| continental drift theory | Wegener |
| sea floor spreading | Hess |
| convection currents | moves plates |
| Glomar Challenger | Drilled for rock samples on the sea floor |
| alternating magnetic bands | provides evidence of sea floor spreading |
| The direction convection currents move | horizontal |
| The theory of seafloor spreading | Harry Hess |
| The zone where plates collide and partialy melt | subduction zone |
| The oldest age of seafloor rocks | 180 million |
| How long ago did Pangaea formed? | 200 million |
| Clues that support Continental Drift | Rock, fossil, and climate |
| What forms when two continental plates collide? | mountain ranges |
| What occurs above subduction zones? | volcanoes |
| What occurs above transform boundaries? | earthquakes |
| What kind of boundary would you expect to find at the Mid Ocean Ridge? | divergent |
