Question 1

The region that lost the most of its tropical forests during the last century was

Accepted Answer

A

Question 2

While the world population nearly quadrupled during the twentieth century,the global output of goods rose about

Accepted Answer

The global output of goods rose about 19 times during the twentieth century, reflecting significant industrial and technological advancements.

Question 3

At the end of the twentieth century,the majority of the world's population was living in settlements of

Accepted Answer

By the end of the twentieth century, urbanization had increased significantly, with a majority of the world's population living in urban areas or settlements of 20,000 or more.

Question 4

What country released more sulfur dioxide into the air than any other country during the 1990s?

Accepted Answer

According to data from the Global Monitoring Program, China released more sulfur dioxide into the air than any other country during the 1990s, primarily due to its heavy reliance on coal for energy production.

Question 5

One of the key health benefits fish provide for people is

Accepted Answer

Fish, especially fatty fish like salmon, are high in omega-3 fatty acids which have been shown to lower cholesterol levels and reduce the risk of heart disease. Consuming fish as a regular part of a balanced diet can help improve overall health and well-being.

Question 6

It is estimated that in the future,cities will normally range in population from

Accepted Answer

The answer of It is estimated that in the future,cities...

Question 7

One of the most serious problems that can occur from poorly managed irrigation from dams and reservoirs is that

Accepted Answer

Poorly managed irrigation can lead to high concentrations of salt in the soil, which can make it unsuitable for farming. This is known as soil salinization and can result in reduced crop yields or even complete crop failure.

Question 8

At the end of the twentieth century,the world faced the loss of more species than at any time since the end of the last Ice Age.Of the recorded species of birds and animals,approximately

Accepted Answer

Approximately 1 percent of the recorded species of birds and animals are at risk of extinction.

Question 9

One area that has suffered ecological damage as a result of the Aswan Dam is the

Accepted Answer

The Aswan Dam has led to ecological damage in the Mediterranean Sea by disrupting the flow of silt and nutrients that were previously carried by the Nile River, affecting marine life and ecosystems in the area.

Question 10

By the end of the twentieth century,there were signs that urbanization was

Accepted Answer

The answer of By the end of the twentieth century,there...

Question 11

The chief problem with a switch to hydrogen as an energy source for automobiles is

Accepted Answer

The chief problem with a switch to hydrogen as an energy source for automobiles is the profitability. The production of hydrogen fuel cells is currently expensive and there is not yet a well-established infrastructure for hydrogen fuel distribution. As a result, the cost of hydrogen fuel is currently higher than gasoline or diesel. This makes it difficult for automakers to sell hydrogen-powered vehicles at a competitive price and for consumers to justify purchasing them.

Question 12

In urban areas,the poor face all of the following critical health problems EXCEPT:

Accepted Answer

Cheap food may actually be a problem for the poor in urban areas, as it is often high in calories but low in essential nutrients. The other options listed (air pollution, water pollution and shortages, and housing shortages) are all critical health problems that disproportionately affect the poor in urban areas.

Question 13

One reason for the rise in obesity is related to people eating food that

Accepted Answer

Food that has a high carbohydrate content, especially refined carbohydrates and sugars, can lead to an increase in insulin resistance and the deposition of fat in the body. This can contribute to the development of obesity.

Question 14

In order for it to work,hydroelectricity requires

Accepted Answer

Hydroelectricity relies on the force of moving water to generate electricity, which is achieved through the construction of dams on large rivers. This allows for the buildup of a reservoir of water which can be released through turbines in order to generate electricity. Therefore, hydroelectricity requires a big river that can be dammed. Choices A and B refer to wind and solar power respectively, while uranium is used in nuclear power plants.

Question 15

The "green revolution" was a movement that led to

Accepted Answer

The "green revolution" was a movement that began in the 1940s and was aimed at increasing agriculture productivity through the use of new hybrid crops that were heavily dependent on fertilizers and pesticides. This led to higher crop yields and helped to feed a growing global population, but also had negative environmental impacts and contributed to the rise of industrial agriculture.

Question 16

The area of the earth that is least explored and understood is

Accepted Answer

The oceans are the largest and deepest parts of the Earth, covering more than 70% of the planet's surface, yet less than 5% of it has been explored. Much of the ocean floor remains unmapped and unknown, and many species have yet to be discovered. Therefore, the oceans are the area of the Earth that is least explored and understood.

Question 17

The most short-term cost-efficient alternative form of power generation ever devised is

Accepted Answer

Nuclear power is considered the most short-term cost-efficient alternative form of power generation due to its high energy density and low fuel costs, despite high initial construction costs.

Question 18

The amount of the world's energy supplied by oil at the end of the twentieth century amounted to about

Accepted Answer

At the end of the twentieth century, oil supplied about 40 percent of the world's energy, making it a significant but not overwhelming source of global energy.

Question 19

One of the social consequences of rapid urbanization and the creation of enormous cities has been

Accepted Answer

The growth of gangs and criminal organizations is a common social consequence of rapid urbanization and the creation of enormous cities. This is due to factors such as poverty, lack of opportunities, and a sense of social dislocation and alienation that can lead to the formation of criminal groups. This has been observed in many cities around the world, from Los Angeles to Rio de Janeiro, and represents a significant challenge for urban policymakers and law enforcement agencies.

Question 20

During the 1980s,the infant mortality rate in Cubatão,Brazil,was

Accepted Answer

During the 1980s, Cubatão, Brazil, was known for its high levels of pollution, which contributed to a high infant mortality rate of around 35 percent.

Quiz 30: The Embattled Biosphere: The Twentieth-Century Environment