What is the process called when rocks carried by river water collide and break into smaller pieces?
Waterfalls and Gorges

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Science, Biology
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6th - 12th Grade
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Corrosion
Attrition
Hydraulic action
Abrasion
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does hydraulic action contribute to riverbank erosion?
By chemically reacting with the rock
By carrying rocks downstream
By trapping and pressurizing air in cracks
By dissolving minerals in the rock
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of erosion is caused by slightly acidic rainwater flowing over limestone?
Hydraulic action
Attrition
Abrasion
Corrosion
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What landform is created by vertical erosion in the upper course of a river?
Interlocking spur
Plunge pool
Gorge
V-shaped valley
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when the overhang of a waterfall becomes too large?
It forms a new river
It creates a capstone
It becomes a rapid
It collapses, causing the waterfall to retreat
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