Across
- 4. a Theory Proposed by Alfred Wegener
- 8. waves that only pass through solids
- 9. the two supercontinent, the precursor to Asia
- 11. the final layer of the earth
- 12. a resistance force that resists movement of lithospheric plates
- 13. waves that only travel through the inner layers
- 14. Earth's first supercontinent
Down
- 1. the third layer of the earth
- 2. A geologist who proposed the seafloor spreading theory
- 3. the first layer of the earth
- 5. waves that pass through liquid and solid
- 6. waves that only travel on the surface
- 7. the second layer of the earth
- 10. the two supercontinent, which is present-Day Africa