Across
- 3. They move 5-10cm a year
- 5. Mountain that spews out lava
- 11. Makes plates "float" on the asthenosphere
- 15. Boundary where plates move apart
- 16. Top layer of Earth's surface
- 18. Formed where there is a convergent boundary
- 19. Happens usually along a Transform Boundary
- 20. Largest mountain range
Down
- 1. Middle layer of Earth's surface
- 2. Scale that measures damage in an earthquake
- 4. Holds the asthenosphere, crust, and upper mantle
- 6. Plate we live on
- 7. The theory scientists use to expain plate movement
- 8. Made of liquid metals
- 9. Boundary where plates grind past each other
- 10. Boundary where plates collide
- 12. Scale that measures energy in an earthquake
- 13. Made of iron and nickel
- 14. Wears down Earth's surface
- 17. Mega Continent