What effect did the steeper slope have on erosion? Why?

With more force, water can move more rock particles and larger ones. The speed at which water flows downhill is directly affected by the slope, or steepness, of the land. The steeper the slope, the faster the water flows downhill, and the greater its power of erosion.

The steeper the slope the faster and more powerful the flow of the water can be thus causing more damage to the slope