Across
- 1. boundary where two plates slide past one another horizontally
- 3. the thin outer shell of Earth that is broken into several blocks, made of the Earth's crust and Mantle
- 5. boundary that forms where two plates collide
- 6. when one plate moves under another
- 8. plate _________ is the theory that explains why and how continents move
- 11. boundary at which two plates move away from each other
- 12. study of the alignment of magnetic minerals in rock
Down
- 2. layer of plastic rock just below the lithosphere
- 4. the name of the supercontinent that formed about 300 million years ago
- 7. continental _________ is the theory that explains why and how continents move
- 9. sea-floor ________ is the process by which new sea floor forms as magma rises through a rift
- 10. the movement of heated material throughout the Earth's mantle due to differences in density and temperature