Rivers – True or false
Interactive Video
•
Science, Biology
•
1st - 6th Grade
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
Waterfalls typically form in the upper course of a river where hard rock overlays soft rock. The river erodes the soft rock more easily, creating a steep drop. Over time, the waterfall erodes the soft rock beneath the hard rock, forming an overhang that eventually collapses. This cycle causes the waterfall to move upstream, leaving a gorge behind.
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2 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
Describe the process that occurs after the overhang collapses.
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
What geographical feature is left behind as waterfalls move backwards upstream?
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OFF
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