Across
- 2. Plates move apart
- 5. Plates sliding past one another
- 7. The scientist who proposed the continental drift theory
- 9. Plates moving towards each other
- 12. Large section of Earth's crust
- 13. Volcanic area away from plate boundaries
- 17. Molten rock lava beneath the Earth's surface
- 18. Type of crust which makes up land
- 20. Mountain formed by magma eruption
Down
- 1. Layer beneath the crust
- 3. Giant wave caused by earthquakes underwater
- 4. Where new crust is formed
- 6. Pacific zone known for many volcanoes and earthquakes
- 8. Earth's rigid outer layer
- 10. Type of crust under oceans
- 11. A crack where plates pull apart
- 14. When one plate dives under another
- 15. Shaking caused by plate movement
- 16. A break in Earth's crust
- 19. Deep underwater valley formed by subduction