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Questions and Answers
What characterizes a nonrenewable energy resource?
What characterizes a nonrenewable energy resource?
Which of the following correctly represents the conversion of 600 Calories to joules?
Which of the following correctly represents the conversion of 600 Calories to joules?
What is the primary use of oil, coal, and natural gas worldwide?
What is the primary use of oil, coal, and natural gas worldwide?
What is the primary unit of power represented in watts?
What is the primary unit of power represented in watts?
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Which of the following statements about energy and power is true?
Which of the following statements about energy and power is true?
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How many watts are equivalent to 5 horsepower?
How many watts are equivalent to 5 horsepower?
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What describes the relationship between kilocalorie and joule?
What describes the relationship between kilocalorie and joule?
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Which energy source is NOT considered a fossil fuel?
Which energy source is NOT considered a fossil fuel?
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What is biomass primarily defined as?
What is biomass primarily defined as?
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Which of the following is a characteristic of modern carbon?
Which of the following is a characteristic of modern carbon?
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What distinguishes charcoal from wood in terms of energy content?
What distinguishes charcoal from wood in terms of energy content?
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Which of the following statements is true regarding carbon neutrality?
Which of the following statements is true regarding carbon neutrality?
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What is net removal in the context of biomass?
What is net removal in the context of biomass?
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What is a consequence of unsustainable wood use?
What is a consequence of unsustainable wood use?
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Which factor contributes to the evolution of the Xbox as a carbon neutral product?
Which factor contributes to the evolution of the Xbox as a carbon neutral product?
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What is the main difference between coal and charcoal?
What is the main difference between coal and charcoal?
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What is the main process by which nuclear energy is used to generate electricity?
What is the main process by which nuclear energy is used to generate electricity?
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What is one of the primary disadvantages of using nuclear energy?
What is one of the primary disadvantages of using nuclear energy?
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Which of the following is NOT an advantage of nuclear energy?
Which of the following is NOT an advantage of nuclear energy?
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What is the role of control rods in a nuclear reactor?
What is the role of control rods in a nuclear reactor?
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What is radioactive waste?
What is radioactive waste?
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What does the unit Becquerel (Bq) measure?
What does the unit Becquerel (Bq) measure?
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How long are coal supplies estimated to last?
How long are coal supplies estimated to last?
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What happens to the uranium-235 in a nuclear reactor during fission?
What happens to the uranium-235 in a nuclear reactor during fission?
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What is one negative consequence of creating a reservoir for hydroelectricity?
What is one negative consequence of creating a reservoir for hydroelectricity?
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How do hydroelectric systems potentially affect river ecosystems?
How do hydroelectric systems potentially affect river ecosystems?
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What is the primary benefit of active solar energy systems?
What is the primary benefit of active solar energy systems?
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Which city has the highest average solar energy availability per square meter per day?
Which city has the highest average solar energy availability per square meter per day?
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What do photovoltaic systems do?
What do photovoltaic systems do?
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Which of the following locations has the least solar energy potential based on the provided data?
Which of the following locations has the least solar energy potential based on the provided data?
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What challenge does siltation pose in reservoirs?
What challenge does siltation pose in reservoirs?
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What would be a suitable incentive to increase the number of photovoltaic cells in Arizona?
What would be a suitable incentive to increase the number of photovoltaic cells in Arizona?
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What energy source is considered nondepletable and is derived from Earth's internal heat?
What energy source is considered nondepletable and is derived from Earth's internal heat?
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How do ground source heat pumps primarily obtain heat?
How do ground source heat pumps primarily obtain heat?
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Which of the following is a primary waste product of hydrogen fuel cells?
Which of the following is a primary waste product of hydrogen fuel cells?
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Which countries are identified as the largest producers of geothermal energy?
Which countries are identified as the largest producers of geothermal energy?
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What percentage of energy can ground source heat pumps save compared to traditional heating and cooling systems?
What percentage of energy can ground source heat pumps save compared to traditional heating and cooling systems?
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What is the primary function of a fuel cell?
What is the primary function of a fuel cell?
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What is electrolysis used for in relation to hydrogen fuel cells?
What is electrolysis used for in relation to hydrogen fuel cells?
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What should be considered when planning for a renewable energy strategy?
What should be considered when planning for a renewable energy strategy?
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What is the equivalent of 1 curie in terms of decays per second?
What is the equivalent of 1 curie in terms of decays per second?
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Which type of radioactive waste is associated with fuel rods?
Which type of radioactive waste is associated with fuel rods?
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What process powers the Sun and can be a future energy source?
What process powers the Sun and can be a future energy source?
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When performing addition or subtraction in scientific notation, what must be done first?
When performing addition or subtraction in scientific notation, what must be done first?
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In scientific notation, what happens when multiplying two numbers?
In scientific notation, what happens when multiplying two numbers?
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What must be done to the resulting answer in scientific notation after performing multiplication?
What must be done to the resulting answer in scientific notation after performing multiplication?
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Which method is the least expensive and environmentally sound option for maximizing energy resources?
Which method is the least expensive and environmentally sound option for maximizing energy resources?
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What is the process of nuclear fusion?
What is the process of nuclear fusion?
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Flashcards
Nonrenewable Energy
Nonrenewable Energy
An energy source with a finite supply, primarily fossil fuels and nuclear fuels.
Fossil Fuel
Fossil Fuel
A fuel derived from biological material that became fossilized millions of years ago.
Nuclear Fuel
Nuclear Fuel
Fuel derived from radioactive materials that give off energy.
Energy vs Power
Energy vs Power
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Calorie
Calorie
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Joule
Joule
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Gigajoule (GJ)
Gigajoule (GJ)
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Exajoule (EJ)
Exajoule (EJ)
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Hubbert Curve
Hubbert Curve
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Nuclear fission
Nuclear fission
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Fuel rod
Fuel rod
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Control rod
Control rod
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Advantages of nuclear energy
Advantages of nuclear energy
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Disadvantages of nuclear energy
Disadvantages of nuclear energy
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Radioactive waste
Radioactive waste
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Becquerel (Bq)
Becquerel (Bq)
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Curie
Curie
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High-Level Radioactive Waste
High-Level Radioactive Waste
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Low-Level Radioactive Waste
Low-Level Radioactive Waste
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Uranium Mine Tailings
Uranium Mine Tailings
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Scientific Notation
Scientific Notation
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Energy Conservation
Energy Conservation
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Energy Efficiency
Energy Efficiency
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Biomass
Biomass
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Biofuel
Biofuel
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Modern Carbon
Modern Carbon
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Carbon Neutral
Carbon Neutral
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Net Removal
Net Removal
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Charcoal vs Coal
Charcoal vs Coal
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Solid Biomass
Solid Biomass
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Renewable Electricity
Renewable Electricity
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Geothermal Energy
Geothermal Energy
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Countries with Geothermal Resources
Countries with Geothermal Resources
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Ground Source Heat Pumps
Ground Source Heat Pumps
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Energy Efficiency of Ground Pumps
Energy Efficiency of Ground Pumps
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Fuel Cell
Fuel Cell
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Electrolysis
Electrolysis
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Hydroelectricity Benefits
Hydroelectricity Benefits
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Environmental Impact of Hydroelectricity
Environmental Impact of Hydroelectricity
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Hydrogen Fuel Cells
Hydrogen Fuel Cells
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Siltation
Siltation
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Renewable Energy Strategy Challenges
Renewable Energy Strategy Challenges
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Active Solar Energy
Active Solar Energy
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Photovoltaic Systems
Photovoltaic Systems
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Solar Energy Variability
Solar Energy Variability
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Benefits of Active Solar Energy
Benefits of Active Solar Energy
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Kilowatt Hours (kWh)
Kilowatt Hours (kWh)
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Study Notes
Module 34: Patterns of Energy Use
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Nonrenewable energy is used worldwide and in the United States
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Fossil fuel: A fuel derived from biological material that became fossilized millions of years ago
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Nonrenewable energy resource: An energy source with a finite supply, primarily fossil fuels and nuclear fuels
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Nuclear fuel: Fuel derived from radioactive materials that give off energy
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Worldwide annual energy consumption (2011) was dominated by oil, coal, and natural gas. Fossil fuels accounted for 82%, Oil-32%, Natural gas-21%, Coal/peat- 29%, and renewable energy 13%. Nuclear fuel accounted for 5%.
Units of Energy and Power
- Energy is the ability to do work or transfer heat. Units include joule (J), British Thermal Unit (BTU), calorie, and kilowatt-hour (kWh).
- Power is the rate at which work is done. Units include watt (W) and horsepower (hp). 1 horsepower equals 745.7 watts.
- A calorie is a basic unit of energy. 1 kilocalorie (kcal) = 1,000 calories = 4,184 joules
Math Conversion
- 600 Calories (kcal) is equal to 2,510,400 joules.
- 5 horsepower equals 3,730 watts.
Worldwide Patterns of Energy Use
- A bar graph shows total annual energy consumption (in exajoules) for various countries, and a related bar graph shows per capita annual energy consumption (in gigajoules) for the mentioned countries.
- The 10 featured countries list represent a spread of both high and low energy consumption figures.
Global Energy Consumption Flowchart
- The graphic identifies various types of energy use (past, present, future) with the main components: energy, human consumption, energy return on investment, externalities. Associated categories include: Food Animal Coal Gas Sustainable Wood Wind Oil
Worldwide Patterns of Energy Use
- Commercial energy source: An energy source that is bought and sold.
- Subsistence energy source: An energy source gathered by individuals for their own immediate needs.
Worldwide Patterns of Energy Use: USA
- From 1850 to 2012, energy consumption increased significantly for every source (wood, coal, oil, renewables, hydroelectric power, and natural gas). Wood began declining in the 20th century, eventually overtaken by fossil fuels, which accounted for the majority of US energy sources, with natural gas having the most significant recent increase.
Pie Chart of Total US Energy Consumption in 2012
- Fossil fuels made up almost all energy consumption at 95 quadrillion BTUs. Oil accounted for 37%, Coal accounted for 18%, and Natural Gas accounted for 27%.
- Renewables accounted for 8% of energy consumption, with nuclear fuel being 10%.
Review the Law!
- The Second Law of Thermodynamics dictates that when energy is transformed, its ability to do work diminishes because some energy is lost during each conversion.
Quantifying Energy Efficiency
- Energy efficiency refers to the effectiveness of the processes used to obtain fuel and convert it into work. Coal provides a prime example. Energy is lost throughout extraction, processing, transport, and disposal.
Different energy forms are best suited for specific purposes.
- The ideal energy source depends on the specific need. Energy return on energy invested (EROI) is a measure of effectiveness. EROI = (Energy obtained from fuel)/(Energy invested to obtain fuel). The higher the EROI value, the more efficient the energy.
- Example: Data show different EROI values for coal extracted via surface mining versus subsurface mining, and for hydroelectric power compared to ethanol.
Efficiency and Transportation
- Nearly 30% of US energy is used for transportation. Efficiency is crucial in this sector.
- Transportation relies primarily on vehicles powered by petroleum products (e.g., gasoline and diesel).
- Data (graph) show a trend in overall US vehicle fuel efficiency, with some fluctuation over time.
Electricity Accounts for 40% of Our Energy Use
- Electricity is a common energy carrier.
- Significant energy conversion losses occur during electricity generation, such that only 13% of the total energy consumed is available for final use.
The Process of Electricity Generation
- All thermal power plants convert fuel's potential energy into electricity.
- Turbine: A device with blades (water, wind, steam, or exhaust) that turns a generator.
- Electrical grid: A network of interconnected transmission lines connecting plants and consumers.
The Process of Electricity Generation (Steps using Coal)
- Coal's energy transforms water into steam.
- Steam's kinetic energy rotates a turbine.
- The turbine's rotation powers a generator to produce electricity.
Efficiency of Electricity Generation
- Combined cycle: A power plant that utilizes both exhaust gases and steam turbines.
- Capacity: Maximum electrical output of a plant.
- Capacity factor: The operating time of a power plant per year.
- Cogeneration: The simultaneous generation of both heat and electricity using a single fuel source; this improves the efficiency of electricity generation to as high as 90 percent.
Module 35: Fossil Fuel Resources
- This module discusses the uses and consequences of coal, petroleum, natural gas, oil sands, and liquefied coal. It also forecasts the future use of fossil fuels.
Coal
- Coal is the most abundant and dirtiest fossil fuel. Coal is a solid fuel coming from millions of years of compressed plant matter.
- Types of coal include lignite, sub-bituminous, bituminous, and anthracite.
- Coal formation: Peat, Lignite, Bituminous, and Anthracite coal are formed over millions of years beneath layers of rock and sediment.
Coal: Advantages
- Energy-dense
- Plentiful
- Easy to exploit by surface mining
- Relatively Inexpensive
- Easy to handle and transport
- Needs little refining
Coal: Disadvantages
- Contains impurities
- Releases impurities into the air when burned
- Combustion leads to increased air pollutants
- Ash left behind can contribute to runoff
Petroleum
- Petroleum: A fossil fuel occurring in underground deposits as a liquid mixture of hydrocarbons, water and sulfur. Raw petroleum products taken from the ground are called crude oil.
Petroleum: Advantages
- Convenient to transport and use
- Relatively energy dense
- Cleaner burning than coal
- Used in many applications
Petroleum: Disadvantages
- Releases carbon dioxide into atmosphere
- Possibility of leaks during extraction/transport
- Run-off into marine waterways
- Releases sulfur, mercury, lead, and arsenic into the atmosphere when burned
- Potential for environmental damage near drilling sites (ANWR debate)
Natural Gas
- Natural gas, a component of petroleum, exists as gaseous deposits separate from petroleum.
- Composition: Mostly methane with some ethane, propane, and butane.
Natural Gas: Advantages
- Contains fewer impurities, emitting almost no sulfur dioxide or particulates.
- Emits only 60 percent as much carbon dioxide as coal.
Natural Gas: Disadvantages
- Methane leakage into the atmosphere is a potent greenhouse gas.
- Natural gas exploration can contaminate groundwater.
Oil Sands and Liquefied Coal
- Oil sands are slow-flowing, viscous deposits of bitumen mixed with sand, water and clay.
- Bitumen is degraded petroleum that forms when petroleum surfaces and is shaped by bacteria.
Fossil Fuels are Finite Resource
- Energy Intensity: The energy use per unit of gross domestic product.
- US per capita energy use has been declining recently, despite population growth.
The Hubbert Curve
- A graphical representation of the total petroleum production over time.
- The graph's shape, whether showing an upper or lower estimate of total reserves, indicates that the date by which peak depletion will occur is not strongly affected—i.e., is not substantially different.
The Future of Fossil Use
- If current use continues without additional discovery, conventional oil may be exhausted within 50 years.
- Coal supplies are expected to last at least two centuries.
- New technologies and concerns about greenhouse gasses encourage exploration into alternative energy sources.
Module 36: Nuclear Energy Resources
- Nuclear energy describes the processes of using nuclear fuels to generate electricity. It highlights advantages and disadvantages.
Nuclear Reactors Use Fission to Generate Electricity
- Uranium-235: Used as a fuel source in nuclear electricity generation.
- Fission: A nuclear reaction where a neutron strikes a relatively large atomic nucleus, and the nucleus splits into more parts, releasing additional neutrons and energy (heat).
- Nuclear power plants use nuclear fission heat to boil water, producing steam that turns a turbine and drives a generator.
Nuclear Fission
- The process in which neutrons split larger atomic nuclei into smaller ones, releasing energy. This energy is then used to make steam, turn turbines.
Nuclear Reactors Use Fission to Generate Electricity
- Fuel rod: A cylindrical tube containing nuclear fuel in a nuclear reactor.
- Control rod: A cylindrical device placed between fuel rods in a nuclear reactor to absorb excess neutrons, slowing or stopping the fission reaction.
Nuclear Energy: Advantages and Disadvantages
- Advantages: No air pollution, reduces reliance on imported oil.
- Disadvantages: Possibility of accidents, problematic waste disposal, concern about misuse of nuclear materials.
Radioactive Waste
- Radioactive waste: Nuclear fuel that cannot produce enough heat for a power plant, but continues to emit radioactivity; has very long half-lives.
- Becquerel (Bq): A unit that measures the rate of radioactive material decay. 1 Bq = 1 decay/second.
- Curie: A unit of radiation measure. 1 curie = 37 billion decays/sec
Module 39: Solar, Wind, Geothermal, and Hydrogen
- This module discusses solar, wind, geothermal, and hydrogen energy.
Solar Energy
- Energy from the sun can be captured directly, useful for electricity generation, and many areas with high solar output could support substantial solar energy generation.
Active Solar Energy
- Technologies directly harnessing sunlight. Options include solar water heating systems, photovoltaic systems, and large-scale concentrating solar thermal systems.
Wind Energy
- Wind energy is the kinetic energy of moving air.
- Various countries are establishing significant wind energy capacity.
- Components of wind energy system: Turbine (blade, gearbox) and generator.
Wind Energy: Advantages
- Nondepletable/free (renewable) energy.
- After manufacturing and installation, little input other than wind is required.
- Wind-generated electricity does not pollute or release greenhouse gases.
Wind Energy: Disadvantages
- Most off-grid residential wind energy systems require batteries to store energy.
- Wind turbines can be noisy and visually unappealing.
- Wildlife, including birds and bats, have been shown to be killed by turbine blades.
Geothermal
- Geothermal energy taps the internal heat of the Earth.
- Heat from the Earth can be used directly, or it can generate steam to drive turbines to produce electricity.
- Geothermal resources include ground source heat pumps.
Fuel Cells
- Fuel cells convert fuels (e.g., hydrogen) into electrical current, and water is the only byproduct in most cases.
- Electrolysis is the application of electrical current to water molecules to split them into hydrogen and oxygen molecules.
Module 40: Planning Our Energy Future
- This module forecasts the future of energy usage. It analyzes the economic and environmental implications of using or not using renewable energy to generate electricity.
Our Energy Future
- Efficiency, conservation, and developing sustainable energy strategies are critical for the future.
- One strategy is adopting a smart grid—an electricity transmission network that continuously adjusts energy distribution in response to usage needs.
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Description
Test your knowledge on nonrenewable energy resources and related concepts. This quiz covers topics such as fossil fuels, energy conversion, and sustainability. Challenge yourself with questions on the primary uses of oil, coal, and natural gas, as well as the relationship between different energy units.