1.
About 99% of the energy that heats the earth and our homes comes from _______
Correct Answer
D. The sun
Explanation
The sun is the correct answer because it is the primary source of energy that heats the earth and our homes. The sun emits vast amounts of heat and light through nuclear fusion, which reaches the earth's surface and warms it. This energy is then harnessed and converted into various forms, such as electricity and fossil fuels, which are used to heat our homes. Oil, natural gas, and nuclear power are secondary sources of energy that are derived from the sun's energy through different processes. Electricity can also be generated from the sun through solar panels.
2.
The average American consumes as much energy in one day as a person in the poorest countries consumes in a year.
Correct Answer
A. True
Explanation
The statement is true because the average American consumes a significant amount of energy daily, which includes electricity, transportation fuel, and other resources. In contrast, people living in the poorest countries often lack access to basic energy sources and rely on traditional methods like burning wood or coal for cooking and heating. These methods are inefficient and consume very little energy compared to the average American's daily consumption. Therefore, the energy consumption of an average American in a day is indeed equivalent to what a person in the poorest countries consumes in a year.
3.
Since the late 1980s, automobile gas mileage averages in the United States have
Correct Answer
C. Risen slowly
Explanation
The correct answer is "risen slowly". This is because the statement mentions that automobile gas mileage averages in the United States have remained about the same since the late 1980s. This implies that there has been little to no significant increase or decrease in gas mileage. Therefore, the most logical option is that gas mileage has risen slowly over time.
4.
_____________ is the world's most abundant fossil fuel. However, using it has a severe environmental impact on air, water, and land.
Correct Answer
coal
Explanation
Coal is the world's most abundant fossil fuel, and it is widely used for energy production. However, the combustion of coal releases large amounts of carbon dioxide, sulfur dioxide, and other pollutants into the atmosphere, leading to air pollution and contributing to climate change. Coal mining also has detrimental effects on water quality and land degradation. Therefore, while coal is abundant and has been a major source of energy, its use has severe environmental impacts on air, water, and land.
5.
Using solar energy to heat a building without special equipment such as
pumps or collectors, usually through windows and skylights
Correct Answer
B. Passive solar heating
Explanation
Passive solar heating refers to the use of solar energy to heat a building without the need for additional equipment like pumps or collectors. This method typically utilizes windows and skylights to allow sunlight to enter the building and heat the space naturally. It relies on the design and materials of the building, such as insulation, to retain and distribute the heat effectively. Unlike active solar heating, which involves the use of mechanical or electrical devices to harness and distribute solar energy, passive solar heating is a more simplistic and cost-effective approach.
6.
Global reserves of Natural Gas can last up to __________ years, but its production in the United States is expected to continue declining, resulting in increased dependence on imports from Canada, Russia, and the Middle East.
Correct Answer
E. 125
Explanation
The global reserves of natural gas can last up to 125 years. However, the production of natural gas in the United States is expected to decline, leading to an increased reliance on imports from Canada, Russia, and the Middle East.
7.
What are the downsides of nuclear power?
Correct Answer
D. All of the above
Explanation
The correct answer is "all of the above". This means that all of the statements mentioned in the question are downsides of nuclear power. Nuclear facilities being vulnerable to terrorist attacks poses a significant risk to national security. Nuclear power is also expensive to build, maintain, and decommission. Additionally, the safe storage of radioactive waste for thousands of years is a major challenge, as it requires careful management to prevent environmental contamination and health hazards.
8.
The greatest user of energy in the United States.
Correct Answer
D. Is industry
Explanation
The correct answer is "industry" because it states that the greatest user of energy in the United States is industry. This implies that industries consume the most energy compared to other sectors such as transportation, residential and commercial users, and the trucking industry.
9.
The most efficient fuel is
Correct Answer
C. Natural gas
Explanation
Natural gas is considered the most efficient fuel because it has a high energy content and burns cleaner compared to other fossil fuels like oil and coal. When natural gas is burned, it produces fewer greenhouse gas emissions and pollutants, making it a more environmentally friendly option. Additionally, natural gas is abundant and widely available, making it a reliable and cost-effective fuel source for various applications such as heating, electricity generation, and transportation.
10.
The United States is the
world’s largest oil user but has only around ______% of the world’s proven oil reserves
Correct Answer
A. 3
Explanation
The United States is the world's largest oil user, consuming a significant amount of oil. However, it only possesses around 3% of the world's proven oil reserves. This means that the United States heavily relies on importing oil from other countries to meet its energy needs.
11.
The oil industry is the world’s largest business.
Correct Answer
B. True
Explanation
The given statement is true. The oil industry is indeed the world's largest business. This is because oil is a highly valuable and essential resource that is used in various industries and sectors, including transportation, manufacturing, and energy production. The oil industry encompasses exploration, extraction, refining, and distribution of oil and its by-products. It generates massive revenues and has a significant impact on global economies. Therefore, it can be concluded that the oil industry holds the title of being the world's largest business.
12.
Social scientists suggest it takes only about ____% of the population of a country or of the world to bring about major social change.
Correct Answer
B. 5-10
Explanation
Social scientists suggest that it takes only about 5-10% of the population of a country or of the world to bring about major social change. This means that a relatively small percentage of individuals can have a significant impact on shaping societal norms, values, and behaviors. This concept is based on the idea that once a small group of people adopts a new idea or behavior, it can spread rapidly and influence the larger population. This suggests that social change is often driven by a minority rather than a majority.