Across
- 4. long chains of undersea mountains
- 6. an ancient, huge landmass composed of earlier forms of today' continents
- 7. a process that involves a lithospheric plate sinking into the atmosphere
- 9. a lithospheric plate boundary where two plates come together
- 10. a lithospheric plate boundary where two plates slide by each other
Down
- 1. a theory explaining the structure of the earth's crust
- 2. thick, less-dense lithospheric plates that are made of granite and form the continents
- 3. the idea that continents move around on Earths surface
- 5. heated lower mantle rock that rises toward the lithosphere because it is less dense thn the surrounding mantle rock
- 8. thin,less dense lithospheric plates that are made of basalt and form the ocean floor