| 19. _____Magma |
A The northern half of Pangea after it split apart. |
| 20. ___Continental Drift Theory |
B The deepest places on the surface of the Earth. They are located at subduction zones. |
| 21. ______Mid-ocean ridge |
C Molten rock below the surface of the Earth |
| 22. _____ Laurasia |
D Place where two plates are separating. These plates are moving in opposite directions making the oceans larger. |
| 23. _____Trenches |
E The idea that the Earth's plates are "floating" on the mantle and have been for millions of years. |