Plate Tectonics
Across
- 7. drift is the hypothesis that today’s continents were one large landmass
- 8. the outermost physical layer of Earth
- 9. a system of ideas that explains many related observations about the world
- 10. the layer immediately below the lithosphere
- 12. breaks in rocks
- 13. boundary forms when plates move away from one another
- 14. the large moving pieces that the lithosphere is divided into
- 15. a stress that causes a material to twist or become distorted
- 17. a stress that squeezes or shortens material
- 18. a stress that lengthens a material or pulls it apart
Down
- 1. when one plate sinks below another plate
- 2. the bending, tilting, and breaking of rock
- 3. the process when new sea-floor forms from rising magma
- 4. underwater mountain belts
- 5. boundary forms when plates move toward each other and collide
- 6. form along mid-ocean ridges
- 11. the name Wegener called the supercontinent
- 16. boundary forms when two tectonic plates move past each other in opposite directions