Across
- 4. a natural combination of minerals found as a solid in the earth's crust
- 7. an old-earth idea that rocks go through a series of predictable changes over eons of time
- 10. the measured distance between contour lines on a relief map
- 11. landforms like sand dunes, volcanoes, and glacial deposited till
- 13. the opening at the top of a volcano
- 15. variation in land surface elevations caused by different landforms in an area
- 16. the underground source of oil
- 21. the study of fossils and their preservation
- 22. wind or water wearing away a rock's surface
- 23. a type of depositional mountain formed by the build up of solidified molten rock
- 25. energy sources like coal, petroleum, and natural gas
- 27. a solid fossil fuel believed to form from plant material
- 28. the balance between the downward weights of rock, water, and ice and the upward force of the mantle
- 29. a hot spring that forcibly ejects water into the air
Down
- 1. large moving ice fields found in high mountain passes
- 2. the study of mountains and mountain building processes
- 3. describes a volcano with no recorded activity and whose structure is greatly eroded
- 5. geological processes that break down rock into smaller particles
- 6. a type of rock made from cemented particles or the precipitates of aqueous solutions
- 8. a type of rock that has been changed by extreme heat and pressure within the earth
- 9. landforms that remain after the dissection of a plateau or other tableland
- 12. the complete death of a species
- 14. the relative differences between the highest and the lowest elevations in a region
- 17. a natural elevation of the earth's surface rising to a summit
- 18. a fossil-fuel like methane
- 19. the height of a mountain's summit above sea level
- 20. any naturally occurring, inorganic, crystalline solid having a definite chemical composition
- 24. height the height of a mountain's summit above its base
- 26. the preserved remains of something once alive
- 28. the word literally means "born of fire"