Across
- 2. a mass of molten rocks
- 4. the science that studies earth
- 6. a record made by sysmograph
- 9. a chain of volcanoes that develop parallel to a trench
- 10. the thinpaet of the Earth's crust
- 14. the thick part of the Earth's crust
- 16. the first type of sesmic wave to be recorded
- 19. a activity associated with subduction of ocean
- 20. boundary a region where the plates are moving apart
Down
- 1. a boundary produced when two plates slide past each other
- 3. vibration of earth due to the rapid release of energy
- 5. a convention of heat in the mantle
- 7. a boundary in which two plates move forward
- 8. consolidated mixture of minerals
- 11. second type of wave to be recorded
- 12. a theory which suggest that earth's crust is made up of plates producing earthquakes
- 13. a continuous mass of land with long width
- 15. a depression in the seafloor
- 17. rigid sections of the lithosphere
- 18. any break in a rock