The land area that supplies water to a river system is called a

• water table
• trailer
• house
• watershed

The build up of nutrients in a lake is a process called ________________.

• eutrophication
  
• volcanic eruption
  
• algae buildup
• pond death

What is an underground layer of rock or soil filled with water called?

• Aquifer
• Spring
• Well
• Reservoir

A hole dug into an aquifer to reach groundwater is called... 

• an aquitard/aquiclude
• a well
• a recharge zone
• a water table

Any underground layer of permeable rock or sediment that holds water and allows it to flow is called an 

• Aquifer

• Ocean
• Water table
• Water shed

What is the water that fills the cracks and spaces in underground soil and rock layers called?

• Groundwater
• Water Table
• Precipitation
• Snow

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

• runoff
• recharge
• watershed

• valley

What is a river that flows into another river?

• reservoir
• watershed
• tributary
• stream

Because they have large connected pores, materials such as sand and gravel allow water to pass through.  This is known as 

• Permeable
• Impermeable

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

• runoff
• discharge
• recharge
• tributary