Question

how did changing from a light drizzle to a downpour affect the river and the sediment in it? check all that apply. the river increased its slope. the volume of the river decreased. the velocity of the river increased. there was more erosion in the stream. the type of sediment that moved changed.

Explanation:

• "The river increased its slope": A river's slope is a geographic feature, not directly changed by rainfall intensity, so this is incorrect.
• "The volume of the river decreased": More rainfall (downpour) would add water, increasing volume, so this is incorrect.
• "The velocity of the river increased": Increased rainfall means more water, which increases river velocity (more water flow leads to higher speed), so this is correct.
• "There was more erosion in the stream": Higher velocity increases the river's erosive power, leading to more erosion, so this is correct.
• "The type of sediment that moved changed": Higher velocity allows the river to move larger/ different types of sediment (e.g., from fine to coarser as velocity increases), so this is correct.

Answer:

• The velocity of the river increased.
• There was more erosion in the stream.
• The type of sediment that moved changed.