Across
- 3. A freshwater reptile whose fossils support continental drift
- 5. A type of fern fossil found on multiple continents
- 7. Scientist associated with the Expanding Earth Theory
- 9. A measure of an earthquake's strength
- 10. The ocean floor
Down
- 1. The Earth's rigid outer layer
- 2. The name of the supercontinent that existed millions of years ago
- 4. The scientist who proposed the Continental Drift Theory
- 6. The process where one tectonic plate moves under another
- 8. A large segment of the Earth's lithosphere