Plate Tectonics
Across
- 6. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
- 8. In oceanic-oceanic convergence, the denser plate sinks beneath the _______ _______ plate
- 10. a stress that squeezes or shortens material.
- 11. stress a stress that causes material to twist or become distorted.
- 13. the layer immediately below the lithosphere.
- 14. the process by which Earth's lithosphere pulls apart to form long, narrow, faulted rift valleys.
- 15. the hypothesis that today's continents were once one big landmass
- 16. boundary A tectonic boundary where two plates are moving toward each other.
- 19. boundary A tectonic boundary where two plates are moving away from each other.
Down
- 1. convection one process thought by scientists to be a cause of tectonic plate movement.
- 2. boundary where the two plates slide against each other in a sideways motion.
- 3. the process by which new sea floor forms
- 4. the process by which one tectonic plate is pulled beneath another plate.
- 5. a stress that lengthens a material or pulls a material apart.
- 7. the outermost physical layer of Earth.
- 9. the bending, tilting and breaking of rock.
- 12. ground movements that occur when blocks of rock in Earth move suddenly and release energy.
- 17. trenches deepest land forms found on the ocean floor.
- 18. a system of ideas that explain many related observations about the natural world.