Across
- 2. Preserved remains of ancient life
- 6. Long‑term average weather patterns
- 8. Huge crust blocks moving slowly
- 10. Scientist who proposed drift theory
- 14. Sudden shaking from crust movement
- 15. Mountain releasing magma and gases
- 16. Inner iron‑nickel center of Earth
- 17. Plates slide sideways, cause quakes
- 20. floor – Bottom of ocean basin surface
Down
- 1. Plates collide, mountains or trenches
- 3. Slow side to side quake wave
- 4. Plates move apart, new crust forms
- 5. Ancient supercontinent once united land
- 7. Hot rock layer beneath crust
- 9. Deep ocean valley from subduction
- 11. Fast push‑pull seismic wave
- 12. Large elevated landform on crust
- 13. Earth’s thin, solid outer shell
- 18. Crack where rocks shift suddenly
- 19. Solid natural material of Earth