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Water quiz #2
5/17/12
26
Science
9th Grade
05/15/2012

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Cards

Term
Rainwater passes through upper zone
Definition
zone of aeration
Term
Where the water collects
Definition
zone of saturation
Term
where the two zones meet
Definition
water table
Term
Rock layer that stores groundwater and allows it to flow
Definition
aquifer
Term
Percentage of open space between individual rock particles in a rock layer
Definition
porosity
Term
Ex. of high porosity
Definition
Rock with particles that are the same size (usually bigger)
Term
Ex. of low porosity
Definition
Rocks with different sized particles
Term
Rock's ability to let water pass through
Definition
permeability
Term
Ex. of permeable rock
Definition
sandstone usually sedimentary
Term
the ground surface where water enters an aquifer
Definition
recharge zone
Term
what is groundwater movement determined by?
Definition
slope of water table
Term
When water reaches the earth's surface, and flows out
Definition
spring
Term
A sloping layer of permeable rock sandwiched between two layers of impermeable rock
Definition
artesian formation
Term
A spring whose water flows from a crack in the cap rock of the aquifer
Definition
artesian spring
Term
What DO level causes stress and death in aquatic life?
Definition
4 mg/L
Term
natural occuring compounds of nitrogen and oxygen
Definition
nitrates
Term
What do nitrates come from?
Definition
fertilizers and animal wastes
Term
water's ability to neutralize acid
Definition
alkalinity
Term
What pH is too acidic for aquatic life?
Definition
6
Term
What are sewage treatment plants?
Definition
facilities that clean the waste materials out of water
Term
Describe primary treatment
Definition
  • dirty water passed through large screen to catch solid objects
  • water put in tank where smaller paraticles are filtered out
Term
Describe secondary treatment
Definition
  • water sent to aeration tank where its mixed with oxygen and bacteria
  • water sent settling tank where chlorine is added to disinfect
  • water released
Term
What is a septic tank?
Definition
Large underground tank that cleans the waste water from a household
Term
How septic tanks work?
Definition
Wastewater flows from house into tank where solids sink into bottom, water flows from tank into buried pipes (drain field) and disputes the water
Term
What is the largest user of water?
Definition
Farming
Term
Delivers small amounts of water directly to plant roots
Definition
drip irrigation system
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