Across
- 2. two plates slide past one another, also known as conservative plate boundary since these faults neither create nor destroy lithosphere
- 3. a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge
- 8. heat transfer in a gas or liquid by the circulation of currents from one region to another
- 9. Theory that the Earth's lithosphere (the crust and upper portion of the mantle) is divided into about 12 large plates and several small ones that float on and travel independently over the asthenosphere.
- 11. the two sub-layers of the earth's crust (lithosphere) that move, float, and sometimes fracture and whose interaction causes continental drift, earthquakes, volcanoes, mountains, and oceanic trenches
- 13. a large sea wave caused by an earthquake, landslide or other disturbance under the ocean
Down
- 1. two plates are moving towards one another
- 2. the theory that the earth's continents move gradually over the surface of the planet on a substratum of magma
- 4. tectonic boundary where two plates are moving away from each other and new crust is forming from magma that rises to the Earth's surface between the two plates
- 5. the sideways and downward movement of the edge of a plate
- 6. running along the Mid Atlantic Ridge, was discovered by Maurice Ewing and Bruce Heezen in 1953
- 7. a long narrow steep-sided depression in the earth's oceanic crust, usually lying above a subduction zone
- 10. locations where two tectonic plates meet
- 12. the result of a sudden release of energy in the Earth's crust that creates seismic waves.