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Unit 4 Review
Vocabulary
| Term | Definition |
|---|---|
| cemented | sticking together |
| canyon | formed by water or river breaking rocks and carrying the sediments away |
| delta | formed when a river or water slows down and deposits sediments |
| u-shaped valley | formed by ice or a glacier breaking down rocks and carrying sediments away |
| sand dune | formed by wind depositing sand |
| fossil fuels | coal, oil, and natural gas |
| nonrenewable | cannot be made again during our lifetime |
| renewable | can be made in a short amount of time |
| nonrenewable resources | coal, oil, and natural gas are this type of resource |
| renewable resources | the sun, wind, water, and plants are this type of resource |
| coal | formed from dead plants in a swamp with time, heat, and pressure |
| oil and natural gas | formed from dead tiny ocean organisms with time, heat, and pressure |
| weathering | wind, water, or ice breaking down rocks |
| erosion | wind, water, or ice moving sediments |
| deposition | wind, water, or ice dropping sediments |
| sediments | tiny pieces of rock |
| sedimentary rock | layers of sediments compacted and cemented together |
| compaction | pressure |
| fast changes | earthquakes, landslides, and volcanoes cause this type of changes to the Earth's surface |
| slow changes | wind, water, and ice cause this type of changes to the Earth's surface |
| fossils | the remains of once living organisms found in sedimentary rok |