Question 1
A stream meanders across a broad, flat valley with numerous swamps and lakes. This stream is ________.
◦ running at base level or below base level
◦ running on bedrock
◦ running well above base level
◦ responding to a fall in base level
Question 2
A river is flowing in a broad, alluvial valley and the river is silt-laden but also moves sand and a small amount of gravel. The government decides to build a dam across the valley for power and flood control. What will happen to the river, upstream of the dam?
◦ The river will downcut.
◦ The river will not change.
◦ The river will respond to the new temporary base level and cut laterally outside its valley, widening the valley.
◦ The river will start to deposit sand and gravel, frequently spilling out of its channel.
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