Question 1

The primary effect of thermal pollution on aquatic ecosystems is ________________.

Accepted Answer

A)  causing a large increase in plant productivity 
B)  lowering the pH of the water 
C)  increased evaporation 
D)  lowering the water table 
E)  depleting dissolved oxygen

Question 2

Read the following scenario and answer the question below.
On a September day in 1999, folks began to notice that Lake Jackson in the panhandle region of northern Florida was shrinking. Within a few days, it was almost gone. A sinkhole had opened beneath the lake and drained it, along with all of the fish and alligators.
As aquifers lose water, their substrates can become weaker and less capable of supporting overlying strata and any human structures built upon them. In such cases, the land surface above may subside. Sometimes subsidence can occur locally and suddenly, in the form of sinkholes, areas where the ground gives way with little warning. Once the ground subsides, soil becomes compacted, losing the porosity that enabled it to hold water. Recharging a depleted aquifer may therefore become more difficult.
-A serious problem that results from excessive water withdrawn from aquifers is that ________________.

Accepted Answer

A)  the soils contaminate the aquifer, making it unfit for human use 
B)  the aquifer decreases in size and new aquifers form 
C)  the surrounding soils are compacted and the size of the aquifer is reduced 
D)  the aquifer increases in size, draining a larger surface area and leaving less water in rivers, streams, and lakes 
E)  the water tends to overflow and flood the entire area

Question 3

You want to maintain a healthy pond at your school site. Last year another pond became eutrophic; to avoid that, you want to ________________.

Accepted Answer

A)  provide nitrogen for good nutrient mixing in the benthic zone 
B)  increase the ozone in the littoral zone 
C)  avoid increasing phosphorus runoff into the limnetic zone 
D)  decrease the calcium available in the profundal zone 
E)  increase the carbon-based fertilizers in the littoral zone

Question 4

Define water pollution, point source, and nonpoint source pollution. Which of the two (point source or
non-point source) is easier to identify? Which is easier to legislate? Which currently poses the greatest threat to freshwater?

Accepted Answer

The answer of Define water pollution, point source, and nonpoint...

Question 5

In thermohaline circulation of global current systems, surface water is ________________.

Accepted Answer

A)  driven by winds from north to south 
B)  warm and dense 
C)  cold and dense 
D)  less salty, less dense, and warmer 
E)  saltier and colder

Question 6

Artificial wetlands ________________.

Accepted Answer

A)  are created using xeriscaping methods 
B)  are the major program for replacing lost natural wetlands 
C)  can help purify water and also provide recreational opportunities 
D)  are a source of arsenic contamination in Bangladesh 
E)  purify water for use as bottled drinking water

Question 7

Explain the NADW in the context of global climate change.

Accepted Answer

The answer of Explain the NADW in the context of...

Question 8

Wastewater that is stirred and aerated so that aerobic bacteria consume most of the small pieces of organic matter in the wastewater is being subjected to ________________.

Accepted Answer

A)  basic treatment 
B)  primary treatment 
C)  pre-treatment 
D)  secondary treatment 
E)  tertiary treatment

Question 9

Summarize some of the positive effects of establishing marine reserves.

Accepted Answer

The answer of Summarize some of the positive effects of...

Question 10

Choose the item that best matches each item in the following:
-Any obstruction placed in a river or stream to block flow

Accepted Answer

A) dam 
B) Ogallala aquifer 
C) aqueducts 
D) bogs 
E) pH
F)aquifers
G)vernal pools
H)reservoir
I)water table
J)watershed

Exam 12: Fresh Water, Oceans, and Coasts