Tectonic plates
Across
- 2. tectonics- a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates that move slowly over the underlying mantle.
- 4. spreading- process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity
- 6. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity
- 8. boundary- is a linear feature that exists between two tectonic plates that are moving away from each other.
- 10. the study of the record of the Earth's magnetic field in rocks
- 11. boundary- is an actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.
- 13. Ring of Fire- a major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur
- 16. Zone- is a region of the Earth's crust where tectonic plates meet
- 17. the rigid outer part of the earth, consisting of the crust and upper mantle.
- 18. crust- uppermost layer of the oceanic portion of a tectonic plate
- 19. boundary- is a type of fault whose relative motion is predominantly horizontal
Down
- 1. the upper layer of the earth's mantle
- 3. crust- the relatively thick part of the earth's crust that forms the large landmasses. It is generally older and more complex than the oceanic crust.
- 5. a crack split, or break in something.
- 7. ridges- an underwater mountain range, formed by plate tectonics
- 9. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
- 12. 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
- 14. Arc- a curved chain of volcanic islands located at a tectonic plate margin, typically with a deep ocean trench on the convex side.
- 15. Supercontient