Across
- 4. Study of the changes in Earth's magnetic field over time.
- 7. Area where 1 plate slides under another.
- 10. Circular reefs around a lagoon with no land in it.
- 11. Underwater volcanoes
- 12. Boundaries where plates move towards each other
- 13. Seamounts that form away from plate boundaries over a mantle plume.
- 15. Tall hydrothermal vents with black "smoke".
- 16. Areas where Earth's tectonic plates move apart.
Down
- 1. Volcanic rock with high amounts of magnetite.
- 2. Oxidizing hydrogen sulfide to make carbohydrates.
- 3. Supercontinent proposed by Wegener.
- 5. Boundaries where one plate slides past another
- 6. Spreading boundaries
- 8. Forms a convection cell
- 9. Earth's magnetic field angle changes by latitude.
- 14. Made of calcium carbonate skeletons of coral.