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unit 8
| Question | Answer |
|---|---|
| weathering | The breakdown of rock material by physical and chemical processes is called |
| 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 called |
| acid precipitation | When these stronger acids fall to Earth, they are called |
| 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 called a |
| delta | Streams often deposit their loads in a fan-shaped pattern called 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. |
| beach | is an area of shoreline that is made up of material deposited by waves and currents. |
| 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. |
| dune | Mounds of wind-deposited sand are called |
| loess | Thick deposits of this windblown, fine- grained sediment are known as |
| 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. |
| creep | The extremely slow movement of material downslope is called |
| rockfall | happens when loose rocks fall down a steep slope. |
| landslide | 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. |