Continental Drift

Edit Answers
1234567891011121314
Across
  1. 4. What is the semi-fluid layer beneath the lithosphere called?
  2. 6. What discovery later helped to validate Wegener’s theory of continental drift?
  3. 7. What term describes the movement of continents over Earth's surface?
  4. 8. What theory explains the movement of Earth's outer shell into plates?
  5. 10. What is Earth's outer shell, divided into moving plates?
  6. 12. What is the hypothesis stating that continents have shifted over time?
  7. 13. What lies beneath tectonic plates and is denser than the plates themselves?
  8. 14. What type of evidence includes similar rock formations and fossils across continents?
Down
  1. 1. What was the supercontinent called, which existed 300 million years ago?
  2. 2. Who proposed the theory of continental drift?
  3. 3. What occurs at tectonic plate borders?
  4. 5. What process causes tectonic plates to move over time?
  5. 7. What is the gradual movement of tectonic plates over millions of years called?
  6. 9. How many tectonic plates are on Earth?
  7. 11. What drives convection currents in the mantle?