1. Uplift of a mountain range is likely to result in (circle best answer): (a) s

Question

1. Uplift of a mountain range is likely to result in (circle best answer): (a) submergence of the mountain tops beneath the sea; (b) deposition in and filling in of mountain stream valleys with sediments; (c) decrease in erosion rates in stream canyons; (d) steepening of streams in the mountain range and deepening of their canyons;

2. Which of the following do NOT influence a stream's power to cut a canyon (circle best answer): (a) sediment load carried by stream; (b) amount of water in the stream; (c) erodibility of the rocks in the stream bed: (d) amount of uranium dissolved in the stream; (e) steepness of the streambed.

3. The flow speed of groundwater compared to surface water is generally (circle best answer): (a) depends on the part of the river; (b) faster, (c ) the same: (d) slower (e) cannot be compared without
additional information.

Explanation / Answer

1.(d) steepening of streams in the mountain range and deepening of their canyons;

Note: Uplift of a mountain range causes depth of the Grand Canyon to increase and steepens the stream gradients and their tributaries.

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