Plate Tectonics
Across
- 3. An event that causes a magnetic field to reverse direction
- 6. The rigid outer part of the earth, consisting of the crust and upper mantle
- 8. Happens at subduction zones where one plate is pulled down into the mantle
- 9. The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
- 12. Outermost layer of a planet
- 13. The process that results when magma rises at a mid-ocean ridge and pushes oceanic plates in two different directions away from the ridge
- 14. Hypothesis which suggests that the continents are in constant motion
- 15. Mountain range on the ocean floor, formed by magma at divergent plate boundaries
- 17. The boundary between two plates that move toward each other
- 18. Supercontinent
- 19. Heat is higher up, cold sinks
- 20. When one tectonic plate moves under another tectonic plate
Down
- 1. Second to last layer of the Earth
- 2. Innermost part of a core
- 4. The boundary between two plates that slide past each other
- 5. When magnetized objects reverse direction and orient themselves to point south
- 7. The person who proposed that continents move
- 10. Part of the Earth between the core and the crust
- 11. Earth's surface is divided into large pieces of rigid rock which move over Earth's hot and semi-plastic mantle
- 16. When magnetized objects orient themselves to point north