Plate Tectonics

3. Wegener was this type of scientist
6. Greek word meaning "all the earth"
7. The hypothesis that the continents were once joined
8. this type of heat transfer provides the movement of the plates
10. when one plate descends below another
13. Wegener died here while gathering evidence for his theory
14. boundaries where plates move toward each other
15. cool, dense subducting plates pull the trailing slab into the subduction zone

1. Coal and _____ deposits are evidence of continental drift
2. boundaries where the plates are moving apart
4. Reversals in Earth's ________ field are evidence of seafloor spreading
5. huge pieces of crust and rigid upper mantle
9. uplifted ridges push oceanic plates toward a trench at a subduction zone
11. This comes up through the gap between plates at a mid-ocean ridge and forms rock
12. Earthquakes are common near this type of boundary