| A | B |
|---|
| inner core | inside of the earth |
| outer core | laiquid layer around the core |
| mantle | soild rock that flows due to heat |
| crust | surface layer of the earth |
| tectonic plates | large sections of crust that form continents |
| theory of continental drift | continents that move over the surface of the earth |
| mid-ocean ridge | new crust that forms in the middle of the ocean where volcanos make new crust |
| subduction zone | two plates are forced together and once is pushed underneath the other |
| ocean trench | area of subduction where one plate is pushed under another plate |
| tsunami | a large ocean wave caused by sea floor movements like earthquakes and volcanos |
