Across
- 4. a feature of Earth's surface such as a mountain, hill, dune, ocean, or river
- 6. force of objects pushing on other objects
- 7. the waste remains of plants and animals
- 10. the breakdown of rocks into very small particles by gravity, water, wind, and ice
- 12. a solid fossil fuel that is formed from the remains of plants over very long periods of time
- 14. fuel a natural, nonrenewable fuel such as coal, oil, or natural gas formed a very long time ago from the remains of living organisms
- 15. hill formed by wind blowing and depositing sand
Down
- 1. rock formed when particles of other rocks are deposited in layers are compacted (crushed together) and cemented (binding the sediment)
- 2. gas a flammable material, without a definite form, produced from remains of marine organisms buried under layers of sediment found near oil deposits
- 3. the buildup of land by the settlement of sediment and soil in a new location
- 5. a triangular landform where a river empties into another body of water
- 8. a nonrenewable natural resource produced from the remains of organisms buried under layers of sediment for millions of years
- 9. a deep ravine between cliffs that is most often carved from the landscape by a river
- 11. the removal and movement of sediment from one place to another by gravity, water, wind, or ice
- 13. a low area between higher areas of elevation