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Across 5. The layer where the convection current occurs 6. Around the centre of the earth 8. When the earth shakes 11. The flow of hot rock in the mantle 12. Thick, lighter crust 13. Thin, dense layer. 16. Mountain with a gap in the middle 18. When plates crash into each other creating mountains 19. When they are moving away from eachother 20. A volcano that can still errupt

Down 1. The centre of the earth 2. A volcano is asleep but can still errupt 3. The very edge of a plate 4. When 2 plates slide past each other 7. When they move into eachother 9. The top layer of the earth 10. A giant wave causes by an earthquake 14. Melted rock that has erupted out of a volcano 15. A volcano that cannot erupt anymore 17. A large section of the earth's crust