1.
Electrical energy can be produced from
Correct Answer
D. All of the above
Explanation
Electrical energy can be produced from various sources such as mechanical energy, chemical energy, and radiant energy. Mechanical energy can be converted into electrical energy through generators or turbines. Chemical energy can be converted into electrical energy through batteries or fuel cells. Radiant energy, such as solar energy, can be converted into electrical energy through photovoltaic cells. Therefore, all of the above options are correct as they represent different ways in which electrical energy can be generated.
2.
Which uses the most energy in American homes each
year?
Correct Answer
C. Heating and cooling rooms
Explanation
Heating and cooling rooms uses the most energy in American homes each year. This is because maintaining a comfortable temperature indoors requires a significant amount of energy, especially during extreme weather conditions. Lighting, water heating, and refrigeration also consume energy, but their energy usage is typically lower compared to the energy required for heating and cooling rooms.
3.
Coal, petroleum, natural gas, and propane are fossil
fuels. They are called fossil fuels because:
Correct Answer
A. Petroleum
Explanation
Petroleum is a fossil fuel because it is formed from the remains of ancient plants and animals that lived millions of years ago. Over time, these organic materials were subjected to heat and pressure, causing them to decompose and transform into petroleum. This process took place over millions of years, making petroleum a non-renewable resource.
4.
Coal, petroleum, natural gas, and propane are fossil
fuels. They are called fossil fuels because:
Correct Answer
B. They were formed from the buried remains of plants and tiny animals that lived hundred of millions of years ago
Explanation
Fossil fuels such as coal, petroleum, natural gas, and propane were formed from the buried remains of plants and tiny animals that lived hundreds of millions of years ago. Over time, the organic matter decomposed and underwent heat and pressure, resulting in the formation of these fuels. This process took place over an extensive period, making fossil fuels non-renewable resources. Therefore, the correct answer is that fossil fuels were formed from the buried remains of ancient plants and animals.
5.
Gasoline is produced by refining which fossil fuel?
Correct Answer
B. Petroleum
Explanation
Gasoline is produced by refining petroleum. Petroleum is a fossil fuel that is extracted from the ground and then refined to produce various products, including gasoline. Gasoline is a commonly used fuel for vehicles and is produced through a refining process that separates the different components of petroleum. Therefore, the correct answer is petroleum.
6.
Propane is used instead of natural gas on many farms
and in rural areas. Why is propane often used instead of natural gas?
Correct Answer
B. It's portable
Explanation
Propane is often used instead of natural gas because it is portable. Unlike natural gas, which requires a pipeline infrastructure for distribution, propane can be easily transported and stored in tanks. This makes it a convenient fuel option for farms and rural areas where access to natural gas pipelines may be limited.
7.
Natural gas is transported mainly by
Correct Answer
A. Pipelines
Explanation
Natural gas is primarily transported through pipelines because it is the most efficient and cost-effective method. Pipelines can transport large volumes of natural gas over long distances with minimal energy consumption. They provide a continuous and reliable supply of gas, ensuring a steady flow to meet the demand. Moreover, pipelines have a lower risk of accidents and spills compared to other modes of transportation like trucks or barges. Therefore, pipelines are the preferred choice for transporting natural gas.
8.
Global warming focuses on an increase in the level
of which gas in the atmosphere?
Correct Answer
B. Sulfur dioxide
Explanation
The correct answer is carbon dioxide. Global warming is primarily caused by the increase in carbon dioxide levels in the atmosphere. Carbon dioxide is a greenhouse gas that traps heat from the sun and prevents it from escaping back into space, leading to a rise in Earth's temperature. This phenomenon is known as the greenhouse effect and is responsible for climate change and global warming.
9.
Solar, biomass, geothermal, wind, and hydropower
energy are all renewable sources of energy. They are called renewable
because they
Correct Answer
C. Can be replenished by nature in a short period of time
Explanation
Renewable sources of energy such as solar, biomass, geothermal, wind, and hydropower can be replenished by nature in a short period of time. This means that these sources are not depleted when used and can be continuously harnessed for energy production. Unlike fossil fuels, which take millions of years to form, renewable energy sources can be naturally regenerated within a relatively short timeframe. This makes them sustainable and environmentally friendly options for meeting our energy needs.
10.
Today, which renewable energy source provides the
U.S. with the most energy?
Correct Answer
D. Hydropower
Explanation
Hydropower is currently the renewable energy source that provides the most energy to the U.S. This is because the U.S. has a significant number of hydroelectric power plants that generate electricity by harnessing the power of flowing or falling water. These plants are able to produce large amounts of electricity consistently, making hydropower the leading renewable energy source in terms of energy production.
11.
Electricity is the movement of
Correct Answer
C. Electrical power
Explanation
Electricity is the movement of electrical power. Electrical power refers to the flow of electrical energy in a circuit. It is the rate at which electrical energy is transferred or consumed. When electrons move through a conductor, they carry electrical power with them, which can be used to power devices or perform work. Therefore, electrical power is the correct answer as it accurately describes the movement of electricity.
12.
How much of the energy in burning coal reaches
the consumer as electricity?
Correct Answer
A. 1/3 (one-third)
Explanation
The correct answer is 1/3 (one-third). When coal is burned to produce electricity, a significant amount of energy is lost in the conversion process. This is due to factors such as heat loss, mechanical inefficiencies, and transmission losses. Only about one-third of the energy from burning coal actually reaches the consumer as electricity, making it an inefficient source of energy.