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