AP Environmental Science : AP Environmental Sciences

Study concepts, example questions & explanations for AP Environmental Science

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Example Questions

Example Question #33 : Material Resources

 

A mining company that has leased Bureau of Land Management property for mining in Northern Nevada has discovered a significant copper ore deposit on the land. The deposit lies on relatively flat geography and is projected to be rather shallow at less than 10 meters deep. Which of the following would be the most appropriate extraction method?

Possible Answers:

Mountaintop removal

Strip mining

Contour mining

Open pit mining

Subsurface mining

Correct answer:

Strip mining

Explanation:

Strip mining involves removing shallow strips of dirt and rock to expose valuable ores. Since the deposit is relatively shallow in the earth and the land is relatively flat, strip mining would be the most appropriate method.

Contour mining resembles terraces for farming on a slope, and is indeed only practical on a sloped topography. Mountaintop removal is an equally moot point, seeing that the deposit is on flat land where there are no mountains. Subsurface mining would be appropriate if the deposits were only found deep underground.

Example Question #4 : Mining

What was the purpose of the Surface Mining Control and Reclamation Act of 1977? 

Possible Answers:

To ban mining in places where it did not already exist

To make mining on public land accessible to any individual

To restore previously mined land to its former condition 

To regulate the methods of mining in use at the time

Correct answer:

To restore previously mined land to its former condition 

Explanation:

The Surface Mining Control and Reclamation Act of 1977 was meant to restore previously damaged land to its former state. The key word is reclamation, which is an effort of society to reverse harmful actions taken on the environment and return it to its former state. The act accomplished this by setting operating standards and requiring companies to obtain permits to mine. 

Example Question #5 : Mining

 

The Surface Mining Control and Reclamation Act of 1977 (SMCRA) mandates that companies applying for a permit to mine legally must ensure that their operation will meet SMCRA environmental and performance standards. 

Company A wants to mine for copper on a 20,000 acre land parcel with shallow iron ore deposits on hill-dominated terrain. The company has submitted a permit application, claiming they will employ contour mining, construct a water-tight tailings pond and a board of company shareholders will vote on a use and reclamation method for the land after said mining operation is complete. 

Would Company A get approved permitting under SMCRA? Why or why not?

Possible Answers:

No, because there is not an established reclamation plan for when the mine is defunct. A written and set plan for environmental reclamation must be included with the permit application before a mine can legally operate. 

No, because tailing ponds have been declared an environmental hazard. Even when designed to prevent leaching, there is always a significant risk of toxic chemicals entering the ecosystem. 

Yes, because SMCRA does not address restoring the land after mining. The legislation simply exists to to prevent leaching of toxic chemicals used in surface mining, but there are no clauses to ensure environmental restoration. 

No, because contour mining puts land at an unacceptably high risk of soil erosion. 

Yes, because they have satisfied the SMCRA requirements by planning for responsible mining, pollution control and environmental reclamation. 

Correct answer:

No, because there is not an established reclamation plan for when the mine is defunct. A written and set plan for environmental reclamation must be included with the permit application before a mine can legally operate. 

Explanation:

Permitting under SMCRA requires that mines meet performance and environmental standards as well as provide a detailed excavation plan and a plan for environmental restoration after ceasing operations. Providing an undecided solution that will be voted on later is not a valid environmental reclamation plan, and the firm's application would likely be denied. 

Example Question #321 : Ap Environmental Sciences

Which of the following have been affected by overfishing?

Possible Answers:

Shark fishing across the globe

Cod fishing in Newfoundland

King Crab fishing in Alaska

Crab fishing in the Chesapeake region

Overfishing has affected each of the other answer choices.

Correct answer:

Overfishing has affected each of the other answer choices.

Explanation:

Overfishing is prevalent all over the globe in almost every body of water, from the highest levels of the food chain to the lowest.

Example Question #31 : Material Resources

What percent of the world's fisheries are currently overexploited or exploited to their fullest capacity?

Possible Answers:

Correct answer:

Explanation:

In 2015, 80% of worldwide fisheries are either harvested at their fullest capacity or are being overexploited. This pattern will reduce sustainable fish harvests over the long run and poses a serious threat to the future of ocean ecosystems and the fishing industry.

Example Question #33 : Material Resources

A coastal inlet is currently experiencing an overpopulation of phytoplankton. Which of the following is a likely culprit of this phenomenon?

Possible Answers:

Illegal whaling ships operating miles offshore

Overharvesting and "finning" of sharks to feed demand in Asia

Agricultural activity on the nearby shore that has declined significantly in recent years

Overfishing of coastal herring and sardine populations

Overfishing of tuna populations to meet demand for canned tuna

Correct answer:

Overfishing of coastal herring and sardine populations

Explanation:

Herring and sardines are low trophic-level species that consume mainly phytoplankton. With a diminished local herring and sardine populations, phytoplankton blooms are a likely outcome. Sharks and tuna eat species higher on the trophic level, namely fish like herring or sardines. Whales eat krill and phytoplankton, but are usually offshore and migratory. Of the provided examples, herring and sardines have the most significant impact on phytoplankton populations.

Example Question #1 : Fishing

Which of the following is NOT a destructive aspect specific to trawling?

Possible Answers:

Marine animals not intended to be caught get hooked by lines set out to catch target species.

Trawling equipment is dragged along the seafloor, kicking up sediment in the process that disturb marine flora and wildlife communities.

Drag nets harvest large numbers of fish on a scale that cannot be done with sustainable pole fishing. This massive rate of harvest is responsible for declining fisheries worldwide.

Species not intended to be caught, such as dolphins, get caught in the nets and often die.

Trawling equipment is dragged along the seafloor, damaging coral reefs and other crucial habitat.

Correct answer:

Marine animals not intended to be caught get hooked by lines set out to catch target species.

Explanation:

Trawling employs the use of a large net that is dragged along the ocean floor, but typically no hooks or fishing line is used. A result of drift line fishing, a different harvest method altogether, is that dolphins, sharks and other species not intended to be caught are caught on hooks and die from it.

Example Question #326 : Ap Environmental Sciences

Which of the following best exemplifies the Tragedy of the Commons in modern fishing techniques?

Possible Answers:

Atlantic Cod populations were decimated in the early 1990s and today there are strict regulations on Atlantic cod fishing, resulting in small-scale recreational fishermen harvesting sustainably.

Subsistence fishermen off the coast of Somalia that fish on a small scale to support their families. 

Many subsistence fishermen off the coast of Somalia cannot sustain their livelihood due to competition by larger foreign commercial fishing vessels. 

Commercial fishing vessels traveling to areas with large populations of profitable fish and harvesting in abidance with local and state harvest limits. 

Commercial fishing vessels migrate quickly to areas with large fish populations, harvesting as much as possible before other fishing companies harvest all the fish themselves. 

Correct answer:

Commercial fishing vessels migrate quickly to areas with large fish populations, harvesting as much as possible before other fishing companies harvest all the fish themselves. 

Explanation:

The Tragedy of the Commons is the idea that individuals do not view a resource as a common good and will exploit it to the best of their ability, which, when done by everybody, depletes the resource. The modern commercial fishing practice of overfishing to maximize one's individual gains is a prime example of the Tragedy of the Commons. 

Example Question #325 : Ap Environmental Sciences

Bottom trawling is a fishing method used to catch shrimp and is very detrimental to ecosystems. Not only does it result in the destruction of the sea floor, it also produces tons of unnecessary __________.

Possible Answers:

bycatch

currents

pollution

algal blooms

Correct answer:

bycatch

Explanation:

Bycatch refers to the catching of any species other than the target species during fishing. While most sorts of fishing produce some sort of pollution, this is not the best answer since it is not unique to bottom trawling.

Example Question #326 : Ap Environmental Sciences

Which of these is a drawback to fish farming?

Possible Answers:

Lots of waste is produced

By-catch must be thrown back

The ocean is allowed to recover from damage due to fishing gear

Wild populations get a chance to rebound

Catching farmed fish is easier than catching wild fish

Correct answer:

Lots of waste is produced

Explanation:

Fish farming is seen as an alternative to wild-caught fish and thought to give wild populations a chance to rebound, both in commercial species and in by-catch species and also to let the wild ocean recover from damage done by fishing gear. However, fish farms produce a great deal of waste, and do habitat damage where they are located.

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