Hydrogeology

What do we call the land area that supplies water to a river system?

• runoff
• recharge
• watershed
• valley

What mechanism controls the flow of water in runoff?

• gravity
• temperature
• permeability
• porosity

Materials that allow water to pass through them easily are

• unsaturated
• impermeable
• saturated
• permeable

What do we call water that flows over the ground surface rather than soaking in?

• runoff
• discharge
• recharge
• tributary

Stream erosion is controlled by

• velocity
• discharge
• sediment
• both velocity & discharge

What do we call the many small streams that come together at the source of the river?

• tributary
• meander
• headwaters
• watershed

Which of the following conditions DOES NOT increase surface runoff?

• heavy rainfall
• a large amount of trees & vegetation
• large amounts of concrete
• steep slopes

At present, what percentage of Earth's land surface is covered by glaciers?

• 10%
• 50%
• 5%
• 0.1%

Wetlands help control flooding by

• absorbing runoff from heavy rains
• collecting water behind dams
• providing natural water filtration
• quickly releasing water

People can obtain groundwater by drilling a well

• above the water table
• into an aquifer
• into the unsaturated zone
• into an impermeable layer