Across
- 5. A large landmass of all land on Earth joined together that began to break apart approximately 200 million years ago
- 7. The movement of Earth’s continents over time
- 9. A deep, underwater trough created by one plate subducting under another plate at a convergent plate boundary
- 10. The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
- 12. The boundary between two plates that move toward each other
- 14. A large section of Earth’s oceanic or continental crust and the rigid upper mantle that moves around on the asthenosphere
- 15. The circulation of particles within a material caused by differences in thermal energy and density
Down
- 1. When magnetized objects reverse direction and orient themselves to point south
- 2. Long, narrow mountain range on the ocean floor; formed by magma at divergent plate boundaries
- 3. The theory that Earth’s surface is broken into large, rigid pieces that move with respect to each other
- 4. The process that moves large bodies of Earth materials to higher elevations
- 6. The boundary between two plates that slide past each other
- 8. The boundary between two plates that move away from each other
- 11. The process that occurs when one tectonic plate moves under another tectonic plate
- 13. When magnetized objects, such as compass needles, orient themselves to point north