video

• What is the primary function of electricity in homes?

  It powers lighting and appliances
• How does electricity power mobile phones?

  It charges the battery of the phone
• What is an energy surplus?

  More energy than needed
• What is an energy deficit?

  Not enough energy to meet needs
• Why is energy traded between countries?

  To balance energy surplus and deficit
• What is the trend in global energy consumption?

  It is increasing globally
• What are renewable energy resources?

  Resources that can be replaced quickly
• What are non-renewable energy resources?

  Resources that cannot be replaced quickly
• What is the main source of energy consumption in many countries?

  Fossil fuels
• What is energy consumption measured per capita?

  Average energy use per person
• Which countries are among the highest energy consumers per capita?

  Iceland, Canada, and the USA
• Why is it cheaper for a country to use its own energy reserves?

  It avoids importing resources
• What is geothermal power?

  Electricity generation using Earth's heat
• What is the impact of burning fossil fuels?

  It releases carbon dioxide
• What are the advantages of fossil fuels?

  Easy to use and cheap energy
• What are the disadvantages of fossil fuels?

  They contribute to global warming
• What is nuclear power?

  Energy from nuclear reactions
• What is uranium used for?

  As fuel in nuclear power stations
• What are the advantages of nuclear power?

  Produces low carbon emissions
• What are the disadvantages of nuclear power?

  Accidents can be highly dangerous
• What is wind power?

  Energy harnessed from wind
• What are the advantages of wind power?

  Does not generate carbon emissions
• What are the disadvantages of wind power?

  Only usable when the wind blows
• What is hydroelectric power (HEP)?

  Electricity generated using moving water
• What are the advantages of hydroelectric power?

  Does not generate carbon emissions
• What are the disadvantages of hydroelectric power?

  Dams can be expensive to build
• What is solar energy?

  Energy from the Sun converted to electricity
• What are the advantages of solar energy?

  Does not generate carbon emissions
• What are the disadvantages of solar energy?

  High initial costs and maintenance needed
• Which types of energy do not produce carbon emissions?

  Wind, hydroelectric, and solar power
• What are the advantages and disadvantages of renewable energy sources?

  Advantages:

  • Can be replaced quickly
  • Low carbon emissions

  
  

  Disadvantages:

  • Initial costs can be high
  • Equipment requires maintenance
• What are the advantages and disadvantages of non-renewable energy sources?

  Advantages:

  • Easy to use
  • Generates large amounts of energy cheaply

  
  

  Disadvantages:

  • Contributes to global warming
  • Eventually will run out
• What is the process of how electricity reaches homes?

  1. Turbines are turned to generate electricity
  2. Kinetic energy is converted into electric current
  3. Voltage is increased by transformers
  4. Electricity travels through the national grid
  5. Substations lower voltage for safe home use
• What is energy security and its implications?

  • Having an uninterrupted energy supply
  • Can lead to disputes between countries
  • Example: Ethiopia's Grand Renaissance Dam conflict