Energy Sources and Processes Quiz

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Questions and Answers

What is the primary source of energy for hydroelectric power?

  • Wind movement
  • Solar radiation
  • Moving water (correct)
  • Nuclear reactions

What is a major environmental disadvantage of hydroelectric dams?

  • Increased soil erosion
  • Higher carbon emissions
  • Disruption of local ecosystems (correct)
  • Reduction of freshwater sources

Which type of energy resource is tidal energy considered?

  • Geothermal
  • Non-renewable
  • Renewable (correct)
  • Fossil fuel

Which element is commonly known to be the fuel in a nuclear reactor?

<p>Uranium (D)</p> Signup and view all the answers

What are the primary by-products from burning fossil fuels and biomass?

<p>Carbon dioxide and water vapor (A)</p> Signup and view all the answers

What happens to matter in nuclear fusion and fission?

<p>Matter is changed to energy (A)</p> Signup and view all the answers

What is the role of control rods in a nuclear reactor?

<p>To regulate the nuclear reaction (B)</p> Signup and view all the answers

Which type of radiation is capable of causing other substances to become radioactive?

<p>Neutrons (B)</p> Signup and view all the answers

What process is used to obtain various products from petroleum?

<p>Fractional distillation (A)</p> Signup and view all the answers

Which of the following is a disadvantage of using hydrogen fuel cells?

<p>Requires a lot of energy (D)</p> Signup and view all the answers

What type of energy resource is geothermal energy classified as?

<p>Renewable (D)</p> Signup and view all the answers

What element is known to have significantly more energy than the same amount of coal?

<p>Uranium-235 (B)</p> Signup and view all the answers

Which of the following is NOT considered a type of biomass?

<p>Natural gas (C)</p> Signup and view all the answers

What energy transformation occurs in a generator?

<p>Mechanical energy into electrical energy (B)</p> Signup and view all the answers

What is one characteristic of photochemical smog?

<p>Results from sunlight reacting with pollutants (C)</p> Signup and view all the answers

Which statement regarding charging capacity is true?

<p>Reaching carrying capacity means resource limits have been surpassed (A)</p> Signup and view all the answers

What are the advantages of using wind as an energy resource?

<p>Renewable and clean (D)</p> Signup and view all the answers

What is tidal energy primarily driven by?

<p>Gravitational forces of celestial bodies (B)</p> Signup and view all the answers

What happens when fossil fuels and biomass are burned?

<p>They emit carbon dioxide and water vapor (A)</p> Signup and view all the answers

What type of nuclear process involves splitting nuclei?

<p>Fission (D)</p> Signup and view all the answers

How long will it take for a sample of thorium-234 to reduce to 12.5g if its half-life is 24 days?

<p>72 days (C)</p> Signup and view all the answers

Flashcards

Fossil fuel byproducts

Burning fossil fuels and biomass create carbon dioxide and water vapor.

Nuclear Fusion vs. Fission

Nuclear fusion combines atoms, releasing energy. Nuclear fission splits atoms, also releasing energy.

Tidal Energy

Tidal energy harnesses the movement of water caused by gravitational forces between Earth, its moon, and the sun. It's a renewable energy source.

Solar Energy Devices

Devices that use solar radiation to produce electricity. Examples include solar panels and photovoltaic cells.

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Hydroelectric Power

Hydroelectric power uses the energy of moving water (like rivers or tides) to generate electricity.

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Control Rods

Control rods are used to regulate the rate of nuclear reactions by absorbing neutrons, slowing down the chain reaction.

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Photochemical Smog

Photochemical smog is a type of air pollution formed when sunlight reacts with pollutants like nitrogen oxides and volatile organic compounds.

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Carrying Capacity

The carrying capacity is the maximum population size an environment can sustain given its resources.

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Fractional Distillation

A process that separates different components of petroleum based on their boiling points, resulting in products like gasoline, diesel, and kerosene.

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Renewable Energy

Energy sources that can be replenished naturally, such as solar, wind, geothermal, hydroelectric, and biomass.

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Hydrogen Fuel Cells

A type of fuel that produces only water as a byproduct when burned, making it a clean energy source. However, it's currently expensive and requires a lot of energy to produce.

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Geothermal Energy

Energy derived from the heat within the Earth, typically found in areas with volcanic activity.

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Nuclear Energy

Energy generated from the fission of uranium atoms, producing a large amount of heat, which can be used to generate electricity. However, it produces radioactive waste.

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Nuclear Fission

The process of splitting atoms, releasing energy.

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Nuclear Fusion

The process of combining atoms, releasing tremendous energy.

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Radioactive Half-Life

The natural decay of radioactive elements, releasing energy and transforming into a different element. The time it takes for half of a radioactive substance to decay.

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Photovoltaic Cells

Devices that convert solar radiation (light) into electricity, such as solar panels.

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Gamma Radiation

A type of radiation consisting of high-energy electromagnetic waves. Highly penetrating, can damage living tissue.

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Study Notes

Energy Sources and Processes

  • Hydroelectric power derives energy from moving water (rivers or tides).
  • In 2025, the global human population is predicted to be 8 billion.
  • Nuclear reactors produce steam to power turbines, using thermal energy from the reactor.
  • Burning fossil fuels and biomass produces carbon dioxide and water vapor as byproducts.
  • Fossil fuels originate from decayed plants and animals.
  • Uranium is a common fuel in nuclear reactors.
  • Nuclear fusion and fission involve changes in matter, transforming it into energy.
  • Hydroelectric dams can disrupt local ecosystems.
  • Tidal energy results from the gravitational forces between Earth, its Moon, and the Sun.
  • Solar panels and photovoltaic cells use solar (radiant) energy to produce electricity.
  • Control rods regulate nuclear reactions.
  • Species populations are limited by carrying capacity (resources).
  • Photochemical smog is formed from sunlight reacting with pollutants.
  • Wind power is a renewable and clean resource, impacting wildlife.
  • Environmental disadvantages of hydroelectric dams include ecosystem disruptions.

Energy Conversions

  • Generators convert mechanical energy into electrical energy.
  • Fission splits atoms; fusion combines them.

Radioactive Decay

  • Alpha particles are helium nuclei; beta particles are high-energy electrons; gamma rays are high-energy electromagnetic waves.
  • Gamma radiation can make other substances radioactive.
  • Neutrons can cause substances to become radioactive.
  • Thorium-234 has a half-life of 24 days. If initially 100g of thorium-234 is present, 12.5g will remain after 72 days.

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