Renewable Energy
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Questions and Answers

What are the two methods for generating solar energy?

  • Photovoltaic and hydroelectric power
  • Thermal steam and wind power
  • Thermal electric and photovoltaic power (correct)
  • Nuclear and geothermal power

    • Where is geothermal energy most accessible?

  • Along the earth's crustal plate boundaries (correct)
  • In the middle of the ocean
  • In the polar regions
  • In the desert

    • What is tidal power?

  • A well-researched and proven source of energy from oceans (correct)
  • A new, untested source of energy from oceans
  • A type of wind energy generated by ocean currents
  • A type of solar energy generated by the reflection of sunlight off the ocean's surface

    • What is the primary reason renewable energy is not as cost competitive as fossil fuels?

    <p>Insufficient effort and financing</p> Signup and view all the answers

    What is the most widely used renewable energy source?

    <p>Hydropower</p> Signup and view all the answers

    How do solar thermal electric generators produce electricity?

    <p>By using mirrors to heat fluid and produce steam</p> Signup and view all the answers

    What is the main challenge facing renewable energy development?

    <p>Political issues</p> Signup and view all the answers

    Which country holds more than half of the world's primary geothermal energy supply?

    <p>Iceland</p> Signup and view all the answers

    What is a benefit of using tides for energy?

    <p>Tides are predictable and reliable, with no pollution</p> Signup and view all the answers

    What is the estimated potential for wind energy to meet global electricity demand?

    <p>20%</p> Signup and view all the answers

    What type of geothermal systems are mostly hydrothermal?

    <p>Aquifers of hot water</p> Signup and view all the answers

    What is the expected trend for energy demand?

    <p>Continue rising</p> Signup and view all the answers

    What is the process behind photovoltaic power?

    <p>Absorbing photons in a semi-conductor</p> Signup and view all the answers

    What can barrages do?

    <p>Protect coastlines against storm surges</p> Signup and view all the answers

    Which two regions have made major investments in wind power?

    <p>Denmark and California</p> Signup and view all the answers

    What percentage of Denmark's electricity is projected to come from offshore wind farms by 2025?

    <p>80%</p> Signup and view all the answers

    In what areas is solar energy cost-effective?

    <p>Remote areas</p> Signup and view all the answers

    What is the advantage of renewable energy in terms of construction?

    <p>Small equipment</p> Signup and view all the answers

    What are some environmental challenges associated with geothermal energy?

    <p>Drilling, air and noise pollution, and disposal of waste</p> Signup and view all the answers

    What is the main source of energy in many developing countries?

    <p>Bioenergy</p> Signup and view all the answers

    What are some environmental issues related to wind energy?

    <p>Noise and interference</p> Signup and view all the answers

    What are some environmental concerns with tidal energy?

    <p>Changes to hydro-dynamics</p> Signup and view all the answers

    Will geothermal energy make significant contributions to global energy needs?

    <p>Unlikely</p> Signup and view all the answers

    What is an alternative to barrages for tidal energy?

    <p>Rotation shafts with turbines</p> Signup and view all the answers

    What are the two forms of bioenergy?

    <p>Processed and unprocessed biomass</p> Signup and view all the answers

    What potential impacts do offshore wind farms have on marine environments?

    <p>Alteration of sediment flow</p> Signup and view all the answers

    Which countries have high potential and low energy demand for geothermal energy?

    <p>Djibouti, El Salvador, Kenya, Philippines, and Nicaragua</p> Signup and view all the answers

    What is needed to advance renewable energy technologies?

    <p>Research, development, and demonstration</p> Signup and view all the answers

    What mitigation strategy is suggested for the impacts of offshore wind farms on marine environments?

    <p>Artificial reefs</p> Signup and view all the answers

    Which country has potential for tidal energy but has focused on hydropower?

    <p>Canada</p> Signup and view all the answers

    What is the future potential of bioenergy?

    <p>It has high potential for significant contribution to global energy supply</p> Signup and view all the answers

    In which regions does hydropower have potential for future development?

    <p>Developing countries and the Soviet Union</p> Signup and view all the answers

    Which body of water has one of the largest tidal ranges in the world?

    <p>The Bay of Fundy</p> Signup and view all the answers

    Since when has geothermal energy been commercially exploited for heat, mechanical power, and electricity?

    <p>Early 1900s</p> Signup and view all the answers

    What are some sources of biomass?

    <p>Industrial and agricultural residue, municipal waste, energy plantations, and oil seed</p> Signup and view all the answers

    When was a tidal energy plant established in Annapolis?

    <p>1984</p> Signup and view all the answers

    What percentage of California's electricity is currently provided by wind energy?

    <p>7%</p> Signup and view all the answers

    Is geothermal energy a renewable energy source?

    <p>Yes</p> Signup and view all the answers

    What is the main advantage of tidal energy over fossil fuels?

    <p>It produces less pollution</p> Signup and view all the answers

    Which country has the world's first offshore wind farm?

    <p>Denmark</p> Signup and view all the answers

    What was the primary source of energy before the switch to fossil fuels during industrialization?

    <p>Bioenergy</p> Signup and view all the answers

    What is the main challenge facing renewable energy development in terms of information and education?

    <p>Insufficient education and training</p> Signup and view all the answers

    What is the main disadvantage of tidal energy compared to wind or solar energy?

    <p>It is only available in certain locations</p> Signup and view all the answers

    Which of the following is not a method for generating solar energy?

    <p>Thermal electric power</p> Signup and view all the answers

    What percentage of Denmark's electricity is currently generated from offshore wind farms?

    <p>43%</p> Signup and view all the answers

    Where are the greatest potential impacts of offshore wind farms likely to occur?

    <p>Underwater</p> Signup and view all the answers

    Which of the following is not a source of biomass?

    <p>Solar panels</p> Signup and view all the answers

    What is the potential impact of tidal energy on marine life?

    <p>It could harm marine life by disrupting ecosystems</p> Signup and view all the answers

    Study Notes

    • Hydropower is the most widely used renewable energy source, but faces constraints related to social and environmental impacts.
    • Wind energy has potential to meet future electricity demands, with estimates projecting up to 20% of global demand.
    • California and Denmark have made major investments in wind power, with Denmark projected to generate up to 80% of its electricity from offshore wind farms by 2025.
    • Environmental issues related to wind energy include noise, interference, land requirements, and aesthetics.
    • Offshore wind farms have potential impacts on marine environments, including alteration of sediment flow and composition of species.
    • Artificial reefs at the base of wind turbines may help mitigate impacts.
    • Hydropower has potential for future development, especially in developing countries and the Soviet Union.
    • Wind energy currently provides approximately 7% of California's electricity through 7500 turbines.
    • Denmark has the world's first offshore wind farm and currently generates about 43.6% of its electricity from offshore wind farms.
    • The greatest potential impacts of offshore wind farms on marine environments are likely to occur underwater.

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    Review Quiz for Powering Earth - Renewable Energy

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