Renewable Energy Sources
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Questions and Answers

What percentage of the world's total energy is supplied by renewable energy sources?

  • 13.5% (correct)
  • 5%
  • 20%
  • 10%

    • By what year could alternative energy sources provide half of the world's energy needs?

  • 2070
  • 2050 (correct)
  • 2030
  • 2100

    • What is the primary energy source for approximately 30 percent of the world's population?

  • Hydroelectric power
  • Fuelwood (correct)
  • Coal
  • Solar energy

    • What process converts sunlight into plant material, which can be used as biomass energy?

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

    What are some sources of biomass energy?

    <p>Municipal and industrial wastes, agricultural crop residues, and energy plantations</p> Signup and view all the answers

    What percentage of world energy consumption is accounted for by the 25 member countries of the Organization for Economic Cooperation and Development (OECD)?

    <p>40 percent</p> Signup and view all the answers

    What is the primary source of energy, accounting for nearly 85 percent of the world's energy consumption?

    <p>Conventional fossil fuels</p> Signup and view all the answers

    What is a major nonrenewable energy source whose resources are being used faster than they can be replenished?

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

    What was a factor that led to increased energy consumption in North America and Europe during the 1980s?

    <p>Decrease in oil prices</p> Signup and view all the answers

    What percentage of the world's energy consumption is accounted for by oil?

    <p>33 percent</p> Signup and view all the answers

    How many times greater is the daily energy from the sun compared to energy produced by all other energy sources combined?

    <p>600 times</p> Signup and view all the answers

    What is a major challenge associated with solar energy?

    <p>Intermittent and diffuse nature</p> Signup and view all the answers

    What is the purpose of mirrors in a Solar Power Tower system?

    <p>To focus sunlight at a central point</p> Signup and view all the answers

    What is a consequence of manufacturing solar energy units?

    <p>Large amounts of energy are required</p> Signup and view all the answers

    What is a requirement for thermal or photovoltaic power plants?

    <p>Large amounts of land</p> Signup and view all the answers

    What percentage of the world's energy is currently provided by renewable energy sources?

    <p>12%</p> Signup and view all the answers

    What is a characteristic of steam in geothermal energy?

    <p>It contains hydrogen sulfide gas</p> Signup and view all the answers

    What is the primary difference between a resource and a reserve?

    <p>A reserve is a known deposit that can be economically extracted, while a resource is not</p> Signup and view all the answers

    What is a requirement for tidal power generation?

    <p>A difference in tidal height of at least 5 meters</p> Signup and view all the answers

    What is a potential environmental concern with tidal power?

    <p>It can affect fish migration patterns</p> Signup and view all the answers

    What process transformed the organic matter into coal in the formation of coal deposits?

    <p>Heat and pressure from sediment</p> Signup and view all the answers

    What is a benefit of energy conservation?

    <p>It reduces energy demands and makes it easier to meet future energy needs</p> Signup and view all the answers

    What is the primary source of renewable energy used worldwide?

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

    What is the estimated percentage of energy used worldwide that comes from non-renewable sources?

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

    What has been influenced by the availability of relatively low-cost energy?

    <p>Cultural and lifestyle factors</p> Signup and view all the answers

    What is a characteristic of wind energy?

    <p>It is often used in combination with other energy sources</p> Signup and view all the answers

    What is the purpose of drilling wells in geothermal energy?

    <p>To extract heat from the Earth's crust</p> Signup and view all the answers

    What is a concern related to the installation of wind turbines?

    <p>Hazard to birds and bats from the moving blades</p> Signup and view all the answers

    What is a benefit of using heat pumps in geothermal energy?

    <p>They can be used in areas that are not geologically active</p> Signup and view all the answers

    What is a feature of photovoltaic systems?

    <p>They are often incorporated into the design of a building</p> Signup and view all the answers

    What is a consequence of burning municipal solid wastes?

    <p>Release of toxic products</p> Signup and view all the answers

    What is a long-term process in the context of carbon dioxide?

    <p>Removal of carbon dioxide by plants</p> Signup and view all the answers

    Why is using crops to provide energy not suitable for food production?

    <p>It reduces the land available for food production</p> Signup and view all the answers

    What is the most common method for generating hydroelectric power?

    <p>Damming a river and storing water in a reservoir</p> Signup and view all the answers

    What is a consequence of building dams for hydroelectric power?

    <p>Loss of farmland or forest land due to flooding</p> Signup and view all the answers

    What is trapped in reservoirs, stopping the flow of nutrients downstream?

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

    Why is hydroelectric power best developed in mountainous regions and large river valleys?

    <p>Due to the kinetic energy of flowing water</p> Signup and view all the answers

    What is a consequence of using crop residues and animal manure for energy?

    <p>Diversion from use as fertilizer</p> Signup and view all the answers

    What is a consequence of releasing mercury in hydroelectric power production?

    <p>Accumulation of mercury</p> Signup and view all the answers

    What is a consequence of community relocation due to hydroelectric power production?

    <p>Environmental and social consequences</p> Signup and view all the answers

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