Water Unit

How does a river’s speed affect its erosive ability?

• slower rivers erode the river channel more quickly than faster rivers
• faster rivers erode the river channel more quickly than slower rivers
• faster rivers carry less stream load and are less erosive
• slower rivers carry more stream load and are more erosive.

Which of the following factors affect the local water budget?

• conservation, usage, drought   
• irrigation, industry, recreation
• temperature, vegetation, rainfall
• income, outflow, prediction

When a river’s load and discharge increase, 

• it slows down   
• it becomes a sediment bar
• its erosive power decreases     
• its erosive power increases

Which of the following is NOT an advantage of living on a floodplain?

• good farming
• rich soil
• convenient river access
• good drainage

What has occurred in figure?

• The river cuts across a neck of land, which will isolate the   meander from the rest of the river.
• Erosion in the outer part of the bend is resulting in the meander.
• The river becomes wider and deeper
• The river rounds a bend, and the velocity on the inside of the bend increases, deposition sediment. 

What process is occurring at point B?

• condensation
• precipitation
• evaporation
• runoff

What process is occurring at point D?

• infiltration
• absorption
• transpiration
• evaporation

Like rivers, lakes have life cycles. Most lakes have short life cycles and eventually disappear. Which of the following conditions may cause a lake to disappear?

• when evaporation exceeds precipitation
• when precipitation exceeds evaporation
• when sediments are removed from the lake
• when a local water budge it balanced

The amount of uniformity in the size of a rock or sediment particles is called

• packing
• sorting
• permeability
• cracking

The layer of an aquifer in which the pore space is completely filled with water is called the zone of 

• aeration
• recharge
• porosity
• saturation