The Dead Zone

Question 1

The term hypoxic means...

Accepted Answer

DO content is less than 2 mg/L, but still above zero

Question 2

Eutrophication and dead zones are always the result of human activity (farming, pollution, etc)

Accepted Answer

False

Question 3

An excess of which of the following would most likely be associated with dead zone formation ?

Accepted Answer

nitrogen

Question 4

This term refers to an ecological imbalance caused by excess nutrients.

Accepted Answer

Eutrophication

Question 5

D.O. content readings- Gulf of Mexico Aug-Nov '93. Which depicts the mostly anoxic conditions?

Accepted Answer

August

Question 6

In which month do you think eutrophication was not occurring?

Accepted Answer

November

Question 7

Which correctly expresses the relationship between decomposition & dissolved oxygen?

Accepted Answer

Decomposition uses dissolved oxygen, removing it from water

Question 8

The term anoxic refers to the absence of what?

Accepted Answer

Dissolved Oxygen

Question 9

Too little of which of the following would most likely be associated with dead zone formation ?

Accepted Answer

oxygen

Question 10

DO refers to what ocean chemistry term (related to dead zones)?

Accepted Answer

dissolved oxygen

Question 11

Which of the following DO content would be considered "normal" and supportive of marine life?

Accepted Answer

6 mg/L

Question 12

Who is MOST likely to survive a dead zone?

Accepted Answer

Fish

Question 13

What human activity could lead to phytoplankton blooms?

Accepted Answer

agriculture/fertilizer use, factory emissions, waste water treatment

Questions 13