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Unit 8
Vocabulary
| Term | Definition |
|---|---|
| Weathering | The breakdown of rock material by physical and chemical processes is |
| Physical Weathering | The process by which rock is broken down into smaller pieces by physical changes is |
| Abrasion | is the breaking down and wearing away of rock material by the mechanical action of other rock. |
| Chemical Weathering | is the breakdown of rocks by chemical reactions. |
| Oxidation | The process by which other chemicals combine with oxygen is |
| Acid Precipitation | When these stronger acids fall to Earth, they are |
| Erosion | is the process by which sediment and other materials are moved from one place to another. |
| Deposition | is the process by which eroded material is dropped. |
| Floodplain | Many layers of deposited sediment can form a flat area is a |
| Delta | Streams often deposit their loads in a fan-shaped pattern is a |
| Alluvial Fan | is a fan-shaped deposit that forms on dry land. |
| Groundwater | is the water located within the rocks below Earth’s surface. |
| Shoreline | is the place where land and a body of water meet. Ocean water along a shoreline moves differently than river water moves. |
| Beach | is an area of shoreline that is made up of material deposited by waves and currents. |
| Dunes | Mounds of wind-deposited sand are |
| Loess | Thick deposits of this windblown, fine- grained sediment are |
| Glacier | is a large mass of moving ice that forms by the compacting of snow by natural forces. |
| Glacial Drift | is the general term for all of the materials carried and deposited by a glacier. |
| Rockfall | happens when loose rocks fall down a steep slope. |
| Landside | is the sudden and rapid movement of a large amount of material downslope. |
| Mudflow | A rapid movement of a large mass of mud is a |
| 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 or other large body of water, such as a lake. |
| Coastline | is a dynamic boundary between land and the ocean. |
| Creep | The extremely slow movement of material downslope is a |
| Sandbar | is an underwater or exposed ridge of sand, gravel, or shell material. |
| Barrier Island | is a long, narrow island, usually made of sand, that forms parallel to the shoreline a short distance offshore. |
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