Short Supply
True or False: Freshwater is unevenly distributed around the world.
1 way to increase the freshwater in an area
What is: dams/reservoirs, pumps, aqueducts?
True or False: More than half of all freshwater is lost to evaporation & inefficient use.
What is: TRUE!
Changes to the quality of water that harm life
What is: water pollution?
Where most ocean pollution starts
What is: land?
Term for underground rock that holds flowing water
What is: aquifer?
1 example of water transfer projects
What is: dam/reservoir, aqueducts, canals, etc.?
Clean wastewater from baths, dishwashers, etc.
What is: gray water?
Difference between point and nonpoint source pollution
What is: point source = specific location; nonpoint source = broad?
Why some scientists think it's safe to dump waste in the deep sea
What is: it will be diluted / dispersed?
The top of groundwater, seen as a lake or river; changes with rain / droughts
What is: water table?
1 advantage of dams and reservoirs
What is: control flooding, hydropower, recreation, more FW?
1 way to irrigate a lawn or farmland sustainably
What is: efficient methods, at night, use gray water, monitor soil moisture?
______ can cleanse itself of pollutants quicker: groundwater, river, or lakes
What is: river?
What is: physical / mechanical?
Term for freshwater from rain/snow that's stored at the surface
What is: surface water?
1 effect of overusing an aquifer (besides less water for humans/wildlife)
What is: water table drops / pumped deeper; land subsidence; saltwater intrusion (irrigation; undrinkable water)?
3 uses for gray water
What is: water lawns, clean equipment, irrigate crops, flush waste?
2 factors that allow water to cleanse itself naturally
What is: oxygen, bacteria, flow?
What is: septic tank; treatment plant?
2 reasons freshwater is used unsustainably
What is: aquifers drained too quickly; water is wasted, polluted, & underpriced?
2 disadvantages of dams & reservoirs / water transfer projects
What is: people displaced, releases GHGs, removes ecosystem services, short-term use, disrupts wildlife & ecosystem balance, disrupts fisheries?
2 ways to use freshwater more sustainably
What is: reduce waste, raise prices, slow population growth, protect ecosystems that store water?
This term describes when runoff dumps nutrients into the water, causing nutrient enrichment and potentially dead zones
What is: eutrophication?
How vegetative buffer zones reduce water pollution
What is: plants absorb pollutants before they enter water?