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unit 8
| Question | Answer |
|---|---|
| weathering | The breakdown of rock materials by physical and chemical processes |
| physical weathering | temperature changes, plant and animal actions, water, wind, and gravity |
| abrasion | is the breaking down of other rocks |
| chemical weathering | is the breakdown of rocks by chemical reactions |
| oxidation | rocks surface sometimes change color |
| acid precipitation | acid precipitation is recognized as a problem |
| erosion | is the process by which sediment and other eroded materials |
| deposition | is the process by which eroded material is drop |
| delta | over time, sediment builds up in a delta, forming new land |
| alluvial fan | is a fan-shaped deposit that forms on dry land |
| groundwater | is the water location within the rocks below earth's surface |
| shoreline | the place where land and a body of water meet |
| beach | an area of shoreline that is made up of material |
| sandbar | is an underwater or exposed ridge of sand |
| barrier island | is a long narrow island |
| dune | are common in deserts and along the shores of lakes |
| loess | thick deposits of this windblown fine-grained sediment |
| glacial drift | is the general term for all of the materials carried and deposited by a glacier |
| glacier | is a large mass of moving ice that forms by the compacting of snow by natural forces |
| creep | the extremely slow movement of material downslope |
| rockfall | happens when loose rocks fall down a steep slope |
| landslide | is the sudden and rapid movement of a large amount of material |
| mudflow | a rapid movement of a large mass of mud |
| mountain | is a region of increased elevation on Earth's surface that rises to a peak |
| lake | is a body of fresh or salt water that is surrounded by land |
| river | is a large natural stream of water that flows into an ocean |
| coastline | is a dynamic boundary between land and the ocean |
| floodplain | sediment often contains nutrients needed for plant growth |