Gr 9 NATURAL SCIENCES: CH 3.6 Electricity generation
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Questions and Answers

What is the primary method of generating electricity in power stations?

  • Producing continuous power
  • Burning fossil fuels
  • Converting mechanical energy into electrical energy
  • Converting different forms of energy into electrical energy (correct)

    • What is the function of a turbine in a coal-powered power station?

  • To convert different forms of energy into electrical energy
  • To generate steam
  • To push the blades of a generator
  • To convert mechanical energy into electrical energy (correct)

    • What is the purpose of pulverization in a coal-powered power station?

  • To burn coal more efficiently
  • To generate steam
  • To crush large chunks of coal into a fine powder (correct)
  • To convert mechanical energy into electrical energy

    • What is the main disadvantage of using coal as an energy source?

    <p>It contributes to environmental pollution and climate change</p> Signup and view all the answers

    What is the function of a generator in a coal-powered power station?

    <p>To convert mechanical energy into electrical energy</p> Signup and view all the answers

    What is the purpose of combustion in a coal-powered power station?

    <p>To burn coal</p> Signup and view all the answers

    What is transmitted through power lines in a coal-powered power station?

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

    What type of energy source is coal?

    <p>Non-renewable</p> Signup and view all the answers

    What is the purpose of steam generation in a coal-powered power station?

    <p>To boil water</p> Signup and view all the answers

    What is an alternative energy source?

    <p>Sources of energy that are not derived from fossil fuels</p> Signup and view all the answers

    What is the primary function of a hydroelectric power plant?

    <p>To convert the potential energy of stored water into electricity</p> Signup and view all the answers

    What is a major advantage of wind power?

    <p>Low operational costs</p> Signup and view all the answers

    What is the primary challenge of solar power?

    <p>Intermittent energy supply</p> Signup and view all the answers

    What is geothermal energy used for?

    <p>To generate electricity from the Earth's interior</p> Signup and view all the answers

    What is the primary purpose of a portable generator?

    <p>To provide power during outages</p> Signup and view all the answers

    What is a characteristic of renewable energy sources?

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

    What is biomass energy used for?

    <p>To generate electricity through combustion or anaerobic digestion</p> Signup and view all the answers

    What is the Faraday Disk used for?

    <p>To demonstrate electromagnetic induction</p> Signup and view all the answers

    What is a benefit of using alternative energy sources?

    <p>Lower environmental impact</p> Signup and view all the answers

    What is a common challenge faced by wind power and solar power?

    <p>Variable energy supply</p> Signup and view all the answers

    What is the primary source of energy for hydroelectric power plants?

    <p>Stored water</p> Signup and view all the answers

    What is a common challenge shared by wind and solar power?

    <p>Variable energy supply</p> Signup and view all the answers

    What is the purpose of photovoltaic cells in solar power generation?

    <p>To convert sunlight into electricity</p> Signup and view all the answers

    What is the primary advantage of biomass energy?

    <p>It is renewable</p> Signup and view all the answers

    What is the primary function of a turbine in a hydroelectric power plant?

    <p>To convert kinetic energy into electricity</p> Signup and view all the answers

    What is a characteristic of sustainable energy sources?

    <p>They are renewable</p> Signup and view all the answers

    What is the primary purpose of portable generators?

    <p>To provide backup power during outages</p> Signup and view all the answers

    What is an advantage of hydroelectric power plants?

    <p>They produce no emissions during operation</p> Signup and view all the answers

    What is the primary advantage of wind power?

    <p>It has low operational costs</p> Signup and view all the answers

    What is geothermal energy used for?

    <p>To generate electricity</p> Signup and view all the answers

    What is the primary function of a power station?

    <p>To facilitate the generation of electrical power</p> Signup and view all the answers

    What is the purpose of the turbine in a coal-powered power station?

    <p>To convert mechanical energy into electrical energy</p> Signup and view all the answers

    What is the environmental impact of the reliance on coal as an energy source?

    <p>It results in habitat destruction, environmental pollution, greenhouse gas emissions, and climate change</p> Signup and view all the answers

    What is the purpose of steam generation in a coal-powered power station?

    <p>To boil water to generate steam</p> Signup and view all the answers

    What is the function of a generator in a coal-powered power station?

    <p>To convert mechanical energy into electrical energy</p> Signup and view all the answers

    What is the primary characteristic of coal as an energy source?

    <p>It is a non-renewable energy source</p> Signup and view all the answers

    What is the purpose of combustion in a coal-powered power station?

    <p>To generate steam from burning coal</p> Signup and view all the answers

    What is the primary function of a power station in South Africa?

    <p>To generate electricity from coal</p> Signup and view all the answers

    What is the purpose of pulverization in a coal-powered power station?

    <p>To crush coal into a fine powder</p> Signup and view all the answers

    What is the final step in a coal-powered power station?

    <p>Transmission of generated electricity</p> Signup and view all the answers

    What is the primary source of energy for hydroelectric power plants?

    <p>Stored water</p> Signup and view all the answers

    What is the primary advantage of wind power?

    <p>Low operational costs</p> Signup and view all the answers

    What is the primary purpose of photovoltaic cells in solar power generation?

    <p>To convert sunlight directly into electricity</p> Signup and view all the answers

    What is the primary characteristic of renewable energy sources?

    <p>Can be replenished naturally</p> Signup and view all the answers

    What is the primary function of a turbine in a hydroelectric power plant?

    <p>To turn generators to produce electricity</p> Signup and view all the answers

    What is the primary challenge faced by solar power?

    <p>Intermittent energy supply</p> Signup and view all the answers

    What is the primary purpose of portable generators?

    <p>To generate electricity during power outages</p> Signup and view all the answers

    What is the primary benefit of using alternative energy sources?

    <p>Lower environmental impact</p> Signup and view all the answers

    What is the primary advantage of biomass energy?

    <p>Renewable and sustainable</p> Signup and view all the answers

    What is the primary characteristic of sustainable energy sources?

    <p>Lower environmental impact</p> Signup and view all the answers

    What is the main purpose of a power station?

    <p>To convert different forms of energy into electrical energy</p> Signup and view all the answers

    What is the result of burning coal in a furnace?

    <p>Production of steam</p> Signup and view all the answers

    What is a common characteristic of alternative energy sources?

    <p>They are not derived from fossil fuels</p> Signup and view all the answers

    What is the role of a turbine in a coal-powered power station?

    <p>To convert mechanical energy into electrical energy</p> Signup and view all the answers

    What is the environmental impact of the reliance on coal as an energy source?

    <p>It contributes to environmental pollution and climate change</p> Signup and view all the answers

    What is the purpose of a generator in a coal-powered power station?

    <p>To convert mechanical energy into electrical energy</p> Signup and view all the answers

    What is the primary energy source used in South Africa for electricity generation?

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

    What is the process of converting mechanical energy into electrical energy?

    <p>Electrical generation</p> Signup and view all the answers

    What is the final product of a coal-powered power station?

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

    What is the purpose of pulverization in a coal-powered power station?

    <p>To crush large chunks of coal into a fine powder</p> Signup and view all the answers

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