Unit 4 Review

Subsurface ocean currents continually circulate from the warm waters near the equator to the colder waters in other parts of the world. What is the main cause of these currents?

• differences in the topography along the ocean floor
• differences in density of ocean water
• movement of the jet stream
• the rotation of Earth on its axis

What is most responsible for the presence of groundwater in an area?

• the movement of water from a confined aquifer into surface water
• the movement of surface water and precipitation through soil and rock
• the movement of water from streams and rivers to watersheds
• the movement of surface water through impermable rock

Which is the most common way to access freshwater resources?

• runoff
• digging wells
• melting of glaciers
• geysers

A community decides to upgrade its water purification and management systems. What lasting impact could this have on available freshwater?

• It could cause a decrease in water demand.
• It could cause an increase in waterborne diseases.
• It could cause a decrease in the water levels
• It could cause an increase in the freshwater supply.

Which is the best way to conserve worldwide freshwater resources?

• build more roads and highways for cars and trucks
• increase the amount of land use to raise cattle
• develop more modern coal-powered plants
• use more efficient irrigation techniques

What process is represent by point 2?

• condensation
• transpiration
• evaporation
• infiltration

Water that does not infiltrate into the soil and stays on the surface is called what?

• transpiration
• groundwater
• runoff
• condensation

How could a long-term decrease in precipitation impact an area?

• It could increase the average water level of lakes
• It could increase the amount of flooding
• It could decrease the amount of damage to crops
• It could decrease the amount of infiltration

Which of the following conditions is likely to lead to a flood?

• high soil permeability
• low precipitation
• low water table
• high water table

The following map represents North Carolina's river basins: Which of the following rivers is likely to flow into the Atlantic Ocean?

• Catawba
• Little Tennessee
• Savannah
• White Oak