Across
- 1. the rigid outer part of the earth, consisting of the crust and upper mantle.
- 7. one of the large pieces of the surface of the earth that move separately
- 9. occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth's mantle to the surface, solidifying to create n
- 11. When two plates come together, The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor
- 13. geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other.
- 14. a scientific theory that explains how major landforms are created as a result of Earth's subterranean movements
Down
- 2. Places where plates slide sideways past each other.
- 3. the result of seawater percolating down through fissures in the ocean crust in the vicinity of spreading centers or subduction
- 4. plates that are located beneath the ocean
- 5. the action or process in plate tectonics of the edge of one crustal plate descending below the edge of another
- 6. a giant rift valley that runs along the Atlantic Ocean floor from north to south.
- 7. the movement of continents resulting from the motion of tectonic plates
- 8. the continent we now know as North America was contiguous with Africa, South America, and Europe
- 10. The originator tor of continental drift hypothesis by suggesting in 1912 that the continents are slowly drifting around the Earth
- 12. steep depressions in the deepest parts of the ocean