Rapid growth of algae in a pond is often the result of -
OPTIONS
loss of habitat due to commercial building.
flooding that causes water levels to rise.
excess nutrients from fertilizer runoff.
clogged river tributaries entering a lake.
QUESTION 2
Runoff from agricultural land carries chemicals from fertilizers that collect in a lake. The buildup of chemicals can eventually cause -
OPTIONS
aquatic life, such as fish and turtles, to die from a lack of oxygen.
excess water to fill the aquifer, resulting in pore shrinkage and subsidence.
river tributaries to reroute, changing the flow of natural waterways.
rainfall levels to drop causing drought and a shorter growing season.
QUESTION 3
Overflow during a heavy rainstorm from a wastewater treatment plant would result in -
OPTIONS
polluted runoff into nearby ponds.
flooding in the local aquifer.
weakened housing foundations.
over-treated drinking water.
QUESTION 4
Subsidence, or the sinking of the ground because of weakened underground rock layers, is often the result of humans -
OPTIONS
fertilizing crops with strong chemicals.
building dams to change the direction rivers flow.
excessively pumping water from aquifers.
constructing highways through natural habitats.
QUESTION 5
The illustration provided shows a river and four cities on that river. When the water from the river was sampled at location X, it was determined to be polluted with various chemicals. What would be the most likely source for this pollution?
OPTIONS
City 1 and City 2
City 2 and City 3
City 3 and City 4
City 1 and City 4
QUESTION 6
A paper company wants to build a paper mill in the watershed where a village exists. In order to minimize potential pollution to the village, which of the following locations is the best to build the mill?
OPTIONS
At the highest point in the watershed
Downstream from the village
Closest to a freshwater stream or river
Nearest to the main street of the village
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Answers:
1. Excess nutrients from fertilizer runoff.
2. Aquatic life, such as fish and turtles, to die from a lack of oxygen.
3. Polluted runoff into nearby ponds.
4. Excessively pumping water from aquifers.
5. City 3 and City 4.
6. At the highest point in the watershed.