plate tectonics :)

2. a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
5. a sudden and violent shaking of the ground
8. a long high sea wave caused by an earthquake
10. solid bulk of Earth's interior
12. any of the world's main continuous expanses of land (Africa, Antarctica, Asia, Australia, Europe, North America, South America).
13. a supercontinent
14. the upper layer of the earth's mantle
16. the hypothesis that the Earth's continents have moved over geologic time
17. hot fluid or semifluid material below or within the earth's crust
19. the person whoformulated the first complete statement of the continental drift hypothesis

1. the formation of new areas of oceanic crust
3. name of wegeners theory
4. a mountain with magma inside
6. the rigid outer part of the earth, consisting of the crust and upper mantle.
7. a line of mountains connected by high ground.
9. its lightest, most buoyant rock layer.
11. the fraction of the pore space occupied by water
15. the innermost geologic layer of the planet Earth.
18. a fluid layer thick and composed of mostly iron and nickel that lies above Earth's solid inner core
20. the state of the atmosphere at a place and time as regards heat