Across
- 2. These are natural fuels such as coal, oil, or gas formed in the geological past from the remains of living organisms. (two words)
- 7. A large, thick mass of ice that moves slowly down a mountain valley.
- 10. A natural elevation of the earth's surface, smaller than a mountain.
- 11. The action of using up a resource.
- 12. A group or chain of mountains that are connected and arranged in a line, with similar geological origins and features (two words).
- 13. A natural underground chamber in a hillside or cliff.
- 14. A large pile of something unwanted, such as garbage.
Down
- 1. An area of land overgrown with dense forest and tangled vegetation, typically in the tropics.
- 3. A flowing body of water, smaller than a river.
- 4. An overflow of a large amount of water beyond its normal limits, especially over what is normally dry land.
- 5. These are very large, thick sheets of ice covering a great area, especially a polar region.
- 6. An extended area of land dominated by grasses.
- 8. A thick tropical forest with an abundance of biodiversity and high annual rainfall.
- 9. A vent in the earth's crust through which lava, steam, and ash are expelled.
- 11. A steep rock face, especially at the edge of the sea.