What is something that farmers do that causes eutrophication, leading to dead zones?
Over-fertilize
200
Absence or total depletion of oxygen.
What is anoxia?
200
Which two nutrients are the primary cause of eutrophication?
Nitrogen and Phosphorus
300
Coastal waters too low in oxygen to sustain life.
What is a dead zone?
300
How has the number of dead zones increased per decade?
a) doubled
b) tripled
c) quadrupled
d) no change
a) doubled
400
Rapid increase in the population of algae in an aquatic system.
What is an algae bloom?
400
What percentage of fertilizer do soils absorb?
a) 0%
b) ~20%
c) ~40%
d) ~60%
b) ~20%
500
Excessive richness of nutrients in a lake or other body of water, which causes a dense growth of plant life and death of animal life from lack of oxygen
What is eutrophication?
500
Which is most hypoxia-tolerant?
a) oysters
b) corals
c) jellyfish
d) striped bass