AP Environmental Science : AP Environmental Sciences

Study concepts, example questions & explanations for AP Environmental Science

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Example Questions

Example Question #1 : Laws Of Thermodynamics

Which Law of Thermodynamics explains how Earth is an open system? 

Possible Answers:

The Second Law because the entropy on Earth can only increase. 

The Second Law because the Sun provides energy to the Earth, thus making it unable to be an isolated system. 

The First Law because no energy escapes from Earth, it stays on the planet indefinitely. 

The First Law because all energy on Earth originates from the Sun. 

Correct answer:

The Second Law because the Sun provides energy to the Earth, thus making it unable to be an isolated system. 

Explanation:

The Second Law of thermodynamics states that the entropy on Earth can only increase unless there is an external source of energy. This external source is the Sun, which makes Earth an open system. Energy is able to flow both into an out of the Earth's energy system and explains phenomena such as evolution and global warming. 

Example Question #1 : Energy Usage

Which of the following is the predominant industrial energy source in the United States currently, in 2015?

Possible Answers:

Fossil fuels and natural gas

Geothermal energy

Nuclear energy

Hydroelectric energy

Coal

Correct answer:

Fossil fuels and natural gas

Explanation:

While coal was the predominant source of energy during the Industrial Revolution, advancements in petroleum extraction and refining resulted in petroleum and natural gas becoming the dominant industrial fuel source in the 1950s. This pattern has existed to this day.

Example Question #1 : Large Scale Energy Usage

Which of the following most accurately defines "Energy Star"?

Possible Answers:

A standard for energy-efficiency drafted by private companies that manufacture electronics and consumer goods

An internationally-recognized standard for energy-efficient consumer products, formed by the Environmental Protection Agency and the Department of Energy

A collaborative program formed by private companies that manufacture consumer appliances and the Environmental Protection Agency to set an industry standard of energy efficiency

A program created by the Department of Energy that offers federal rebates for Energy Star certified home appliances, which have higher energy efficiency than the federal standards

A federal energy-efficiency standard mandated for consumer electronics and appliances by the Environmental Protection Agency and the Department of Energy

Correct answer:

An internationally-recognized standard for energy-efficient consumer products, formed by the Environmental Protection Agency and the Department of Energy

Explanation:

The Energy Star certification is a standard of energy efficiency for consumer electronics and appliances that is higher than what is required by federal standards. The program was a joint venture by the Environmental Protection Agency and Department of Energy and has since become an internationally-recognized standard.

Example Question #1 : Small Scale Energy Usage

Why might driving an electric car prove equally damaging to the environment as driving a car that runs on gasoline. 

Possible Answers:

The lithium batteries in electric cars contain toxic chemicals that are difficult to store. 

Electric cars are actually not completely electric. They still contain an internal combustion engine and switch to running on gasoline after the electric battery has died or the car reaches a certain speed. 

Electric cars are often built in third world countries, where factories and firms are not subject to environmental protection or accountability laws. 

If the electricity comes from a polluting source (e.g. coal), then the electric car still contributes to pollution and greenhouse gas emmissions indirectly. 

Electric cars still contribute to traffic congestion and idling vehicles are a large contributor to greenhouse gas emmissions. 

Correct answer:

If the electricity comes from a polluting source (e.g. coal), then the electric car still contributes to pollution and greenhouse gas emmissions indirectly. 

Explanation:

Electric cars with a gas engine are classified as Hybrids, not All-Electric Vehicles. The other answers address the environmental impact of manufacturing and parts, and while these impacts are substantial, their ongoing impact is miniscule when compared to the footprint from regular driving. The majority electricity in America is generated by the burning of fossil fuels, which means driving an electric car regularly still has a carbon footprint and a significant one at that. 

Example Question #351 : Ap Environmental Sciences

Which of the following scenarios most accurately depicts the tragedy of the commons?

Possible Answers:

Collective farming of wine grapes in communities in California.

Depletion of fishing stocks in the North Atlantic.

Allocation of all nuclear wastes to one site in Nevada.

Using national forests for wood production and harvesting.

Agreements among ranchers to jointly manage common grazing land.

Correct answer:

Depletion of fishing stocks in the North Atlantic.

Explanation:

The tragedy of commons is a term used today to describe a situation wherein individuals acting independently and rationally according to their own self-interest behave contrary to the best interests of the greater population by depleting a common resource. In opposition, the examples of ranchers managing common ground and collective farming of grapes are examples of individuals working together in a common interest. Additionally, allocating nuclear waste to one area is rather an example of sacrificing a small area for the greater population, and using national forests for wood production and harvesting is simply disobeying the everyone's interests by depleting resources and breaking the law. However, the depletion of fishing stocks is a perfect example of the tragedy of the commons: It is the ravaging of a greater population's shared natural resource in favor of individual and commercial interest. 

Example Question #1 : Coal, Oil, And Natural Gas

At the current rate of consumption, available natural gas reserves are expected to last another:

Possible Answers:

50 years

100 years

75 years

600 years

25 years

Correct answer:

75 years

Explanation:

Currently available natural gas reserves are expected to last another 75 years at the current rate of consumption.

Example Question #352 : Ap Environmental Sciences

Which type of coal is the cleanest and most efficient?

Possible Answers:

Charcoal

Anthracite

Sub-bituminous coal

Lignite

Bituminous coal

Correct answer:

Anthracite

Explanation:

The least efficient and most abundant form of coal is lignite; after this comes bituminous coal, then, lastly, anthracite. Anthracite is a very hard form of coal with an extremely high carbon content. Anthracite also burns the cleanest of any coal, but unfortunately it is the least abundant and hardest to reach form of coal. Charcoal is not coal at all, but rather compressed and burned wood, consisting mainly of carbon and any remaining ash.

Example Question #353 : Ap Environmental Sciences

Which of the following is NOT a true advantage of utilizing coal as an energy source?

Possible Answers:

Coal produces relatively low sulphur emissions when burned.

Coal can be extracted and processed domestically, potentially reducing U.S. dependency on foreign oil.

Coal is abundant and confirmed reserves are predicted to last three hundred years.

Clean coal technology is a promising technology that reduces the environmental impact of modern coal plants.

Coal is very energy-dense and has a high energy yield.

Correct answer:

Coal produces relatively low sulphur emissions when burned.

Explanation:

Clean coal technology is a promising solution to minimizing pollution from coal plants, and coal is one of the most abundant fossil fuels on the planet, with reserves potentially lasting up to three hundred years. Coal is also very energy-dense when compared to biomass or other renewable energy sources; however, the sulphur content of coal varies based on geographic location, and in areas that depend on locally sourced, sulphur-rich coal, the resulting emissions contribute heavily to acidic precipitation.

Example Question #3 : Coal, Oil, And Natural Gas

Which of the following pairs of factors have placed the United States in a position of dependency on foreign oil?

Possible Answers:

Trade agreements made with OPEC and a per capita demand that far outpaces much of the world.

The environmental and labor regulations for oil refining in the U.S. are more costly to firms than the duties and tariffs from importing oil from less regulated countries.

Most U.S. oil reserves have been exhausted and most oil-rich Middle-Eastern nations are politically very stable and offer reliable trade agreements.

Superior fuel quality from Middle Eastern-sourced petroleum and low import tariffs.

Disproportionately high demand for fossil fuels and a low capacity to produce domestic petrol.

Correct answer:

Disproportionately high demand for fossil fuels and a low capacity to produce domestic petrol.

Explanation:

The United States is 5% of the world Population and consumes 25% of global fossil fuel production. In addition, North America peaked in oil production in the 1970's which, when combined with a disproportionately high demand, results in a national dependence on foreign-sourced oil.

Example Question #354 : Ap Environmental Sciences

Hydraulic fracturing, also called "fracking," is __________.

Possible Answers:

a tool used by humanitarian groups to disperse water

the splitting apart of water molecules

a result of earthquakes

a method of deforestation used primarily in Northern Europe

a way to extract oil from underground sources

Correct answer:

a way to extract oil from underground sources

Explanation:

Fracking is the process of blasting rocks with a mixture of water, sand, and chemicals in order to extract oil from a well. It has grown in popularity in recent years, particularly in the U.S. and Canada.

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