Where are waterfalls and gorges typically found along the long profile of a river?

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Give three characteristics of rapids.

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How are rapids formed?

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What are rapids?

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Give three characteristics of interlocking spurs.

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What are interlocking spurs?

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Why does the valley cross-section change downstream?

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How does the valley cross-section change downstream?

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Why does the channel cross-section of a river change downstream?

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How does a channel cross-section change downstream?

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