Water

The land around these rivers is known as the ________________.

• tributary
• divide
• water system
• watershed

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

• eutrophication
  
• volcanic eruption
  
• algae buildup
• pond death

Impermeable materials...

• have an abundance of pores.
• let water in.
• have little to no pores.

Porosity refers to...

• the shape of the particles
• The sorting of the particles
• % of pore space in a material
• % of cement in a material

Which of the following has the lowest porosity?

• Clay
• Silt
• Gravel
• Sand

If porosity is low then permeability is ______________.

• low
• high

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

• Aquifer
• Spring
• Well
• Reservoir

Open spaces between soil particles that allow water to pass through

• Aquifer
• Well
• Pores
• Spores

Water pollution that comes from many sources is considered...

• point source pollution
• nonpoint source pollution
• thermal pollution
• ocean pollution

______________________ is the buildup of pollutants at higher levels of the food chain.

• porosity
• water pollution
• wastewater
• biomagnification