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Flashcards: Landforms and their Evolution- 1 42 Flashcards 
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What are the three stages of landform development? |
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Youth, mature, and old stages.  |
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Factors influencing erosion include rock structures, climate, and ___ stability. |
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Sea level  |
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True or False: Geomorphology is solely concerned with the materials of landforms. |
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False. Geomorphology studies landforms in relation to their stage, structure, and processes.  |
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The study of landforms is essential in understanding the effects of which geomorphic agents? |
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Running water, moving ice, wind, glaciers, underground water, and waves through erosion and deposition.  |
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Fill in the blank: Each landform is a product of specific geomorphic processes and ___ agents. |
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Geomorphic  |
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Running water is primarily responsible for what type of geomorphic agent in regions with high humidity and heavy rainfall? |
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Land surface degradation.  |
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Overland flow causes ___ erosion, which develops into a network of valleys. |
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Sheet  |
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What is the term for the flat plain formed as a result of stream erosion that appears almost level? |
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Peneplain.  |
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Fill in the blank: As stream beds become gentler due to erosion, downward cutting becomes less dominant while ___ erosion of banks increases. |
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Lateral  |
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What happens to the divides between drainage basins as a result of overland flow? |
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They are lowered until they are almost completely flattened.  |
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True or False: As time passes, the velocity of rivers decreases and the amount of deposition increases. |
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True.  |
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Based on the characteristics of landscapes developing in running water regimes, what happens to hills and valleys over time? |
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They are reduced to flat plains.  |
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What changes occur to stream divides as landscapes transition from youth to mature stages? |
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Stream divides become sharper as the landscape matures.  |
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In the old stage of landscape development, streams are observed to meander freely over ___ floodplains. |
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Vast  |
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Fill in the blank: The landscape in the old stage is characterized by ___ and ___ with gentle gradients. |
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Few smaller tributaries; broad flat divides  |
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What is a key feature of the valleys during the youth stage of landscape development? |
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The valleys are V-shaped and shallow.  |
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True or False: In the mature landscape stage, streams begin to show more integration and the valleys become deeper. |
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True  |
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Fill in the blank: The streams during the old age of a landscape typically show ___ levees and may form ___ lakes. |
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Natural; oxbow  |
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Valleys begin as ___ and evolve into ___ through a process of erosion. |
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Small and narrow rills; long and wide gullies  |
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True or False: A gorge is wider at the top than at the bottom. |
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False; a gorge is almost equal in width at its top and bottom.  |
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Fill in the blank: Potholes on rocky beds are formed due to ___ erosion aided by the ___ of rock fragments. |
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Stream; abrasion  |
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 Completed! Keep practicing to master all of them. |
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