Across
- 4. sits between the asthenosphere and outer core
- 7. shell of hot liquid metal
- 10. pieces that the lithosphere is divided into
- 11. global system of underwater mountains
- 13. grand unifying theory of Earth science
- 14. name of scientist who proposed the theory of continental drift
- 15. solid sphere of hot metal
Down
- 1. warm liquid rock
- 2. hypothesis that states that the continents move slowly over Earth's surface
- 3. name of scientist who proposed the theory of seafloor spreading
- 5. name of fossil found in both Africa and South Africa
- 6. the sinking of the lithosphere into the mantle
- 8. long, deep, steep troughs in the seafloor
- 9. shell of cool and rigid rock
- 12. lies under the lithosphere