Plate tectonics
Across
- 4. plates move past each other
- 8. seafloor spreading occurs along
- 9. the largest tectonic plate
- 10. plates move toward each other
- 12. Shield volcanoes are mostly made of
- 14. ___ volcanoes are mostly at subduction convergent boundaries
- 15. ____ spreading ridges form tall, narrow underwater cliffs/mountains
- 16. there are ___ minor tectonic plates
- 17. a fracture zone/fractures between two blocks of rock
- 18. ___ spreading ridges have much more gentle slopes
- 19. this plate includes the oceanic crust of the Indian Ocean
Down
- 1. Tectonic plates are huge
- 2. There are ___ major tectonic plates
- 3. plates are similar in density and collide
- 5. convergent boundaries can be classified as
- 6. these mountains form a volcanic arc
- 7. plates that move apart
- 9. of (crust and upper mantle)
- 11. the largest volcanoes on Earth
- 13. describes earthquakes that occur at transform boundaries