Across
- 2. A very large expanse of sea
- 5. A mountain or hill having a crater or vent through which lava, rock fragments, hot vapor or gas have been erupted from
- 10. The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
- 11. The gradual movement of the continents across the earth's surface
- 14. The process, condition, or result of being covered by glaciers or ice sheets
- 16. One of earth's seven main divisions of land
- 19. A branch of earth science concerned with the solid earth, the rocks of which it is composed, and how they change over time
- 20. A sudden violent shaking of the ground, can cause great destruction as a result of movements within the earth's crust
Down
- 1. A theory explaining the structure of the earth's crust and the large-scale motion of the earth's plates
- 3. The upper layer of the earth's mantle, below the lithosphere
- 4. Hot fluid or semifluid material below or within the earth's crust
- 6. The outermost shell of a planet
- 7. Where two plates move away from each other
- 8. A supercontinent predicted to have broken apart millions of years ago to create the continents we have today
- 9. The dense central region of earth
- 12. Long narrow depressions on the sea floor that form at the boundary of tectonic plates
- 13. Mostly solid bulk of earth's interior, lies between earth's core and crust
- 15. The solid, outer part of the earth, consisting of the crust and upper mantle
- 17. A location where airflows or ocean currents meet
- 18. A fracture or zone of fractures between two blocks of rock