The Main Landforms Associated With These Processes (Changing river environments)
Overview
A river is a sculptor working in slow motion. With the same handful of tools, erosion, transport and deposition, it cuts plunging waterfalls in the hills, swings lazy meanders across the lowlands, and fans out fertile deltas at the sea. Read the shape of a valley and you can read the river's energy, its rock, and its age.
This lesson takes you landform by landform, from the V-shaped valleys and waterfalls of the upper course to the meanders, oxbow lakes, levees, floodplains and deltas of the lower course. For each one you will learn its key features and, just as importantly, the step-by-step process that forms it, with real examples such as Niagara and Victoria Falls.
Objectives
- The characteristics and formation of landforms: waterfalls, rapids, gorges, V-shaped valleys, meanders, oxbow lakes, levées, floodplains, deltas, interlocking spurs, potholes.
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Mind map
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on The Main Landforms Associated With These Processes (Changing river environments). Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- A waterfall forms where: A. soft rock lies over hard rock B. hard rock lies over soft rock C. the river deposits its load D. two rivers meet Answer: B
- On a meander, erosion is greatest on the: A. inner bank B. outer bank C. river bed only D. slip-off slope Answer: B
- An oxbow lake is finally cut off from the main channel by: A. erosion B. evaporation C. deposition across the loop ends D. tributaries Answer: C
- Raised banks built by deposition during floods are called: A. terraces B. levees C. deltas D. spurs Answer: B
- A steep-sided valley left as a waterfall retreats is a: A. floodplain B. delta C. gorge D. meander Answer: C
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