Across
- 3. A natural fuel formed by geological forces from the residue of living organisms
- 4. A slab of the earth's crust
- 6. The interior part of the earth that lies directly above the core
- 8. The distance of any point east or west of the Prime Medridian, measured up to 180 degrees
- 10. Having to do with geology, the study of the history of the earth found in rocks
- 11. A long region with a trench through which a descending tectonic plate is assimilated into the earth's mantle
- 12. The shape of the land
- 13. A measure of the power of earthquakes
- 17. Rock made up of sediment laid down in layers which have grown together
- 19. A great sea wave produced by an earthquake or by a volcanic eruption
Down
- 1. Solid rock underneather looser materials such as soil
- 2. Someone who studies earthquakes
- 5. A type of sedimentary rock that originates by the evaporation of sea water
- 7. Rock changed from its original form into another form through heat and pressure
- 9. Rock that has been formed by the solidification of molten material
- 14. The distance of any point north or south of the equator, measured up to 90 degrees
- 15. The earth's surface directly above the quake-the middle of the quake
- 16. The natural and undisturbed plants of a region
- 17. To do with earthquakes
- 18. The study of forces within the earth that form its surface features such as mountain ranges and ocean basins
- 20. Molten rock material within the earth from which igneous rock is formed through cooling