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Changes Over Time

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This resource explores the intricate changes that occur in river systems over time, specifically within drainage basins. It defines essential terms such as deltas, meanders, canyons, and plateaus, all of which represent various landforms shaped by geological processes. The text delves into weathering, erosion, and deposition to explain how sediments are transported and deposited in new locations. Illustrated with various diagrams and images, this educational tool enhances comprehension of river dynamics and the environmental impacts of these processes.

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Changes Over Time

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  1. Changes Over Time Week 3

  2. drainage basin A system of rivers and streams that drains an area

  3. delta A fan-shaped (triangular) deposit of earth materials at a mouth of a stream

  4. meander A curve or loop in a channel

  5. landform A natural structure on Earth’s surface

  6. canyon A V-shaped valley eroded by a river or stream

  7. plateau A large, nearly level area that has been lifted above the surrounding area

  8. channel the course or path the water takes in a stream or a river

  9. weathering The breaking down and wearing away of earth materials caused by water, wind, or ice

  10. erosion The movement of weathered materials by water, wind, or ice

  11. deposition The process by which materials eroded by water, wind, or ice are dropped in a new place

  12. sediments Bits of rock, soil, sand, shells, and the remains of organisms

  13. basin a low area in which sediments are often deposited

  14. Slide 2: http://www.mvn.usace.army.mil/pao/bro/MRivDrainageBasin.gif Slide 3: http://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Lena_River_Delta_-_Landsat_2000.jpg/300px-Lena_River_Delta_-_Landsat_2000.jpg Slide 4: http://www.markdixon.ca/images/meander_1_med_rgb.jpg Slide 5:http://www.abcteach.com/free/l/landform3bwlabeled.jpg Slide 6: http://www.planetside.co.uk/terragen/tgd/images/deep_canyon_v04.jpg Slide 7: http://www.hickerphoto.com/data/media/175/colorado_plateau_t3105.jpg Slide 8: http://science.nationalgeographic.com/staticfiles/NGS/Shared/StaticFiles/Science/Images/Content/okavango-channel-744040-sw.jpg Slide 9: http://www.barwonbluff.com.au/education/activities/earth%20science/rock%20on/images/06%20differential%20weathering.jpg Slide 10: http://www.maine.gov/dep/blwq/images2/erosion1a.jpg Slide 11: http://www.fs.fed.us/eng/pubs/html/00771803/images/00771803_fig57a.jpg Slide 12: http://www.searchmesh.net/images/gmhm3-19_coarse_sediment_sample.jpg Slide 13:http://web.mst.edu/~rogersda/cp_megalandslides/0644-sediment_deposits_on_west_wall_near_tapeats_spring.JPG

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