energy

• What is a chemical energy store found in engines?

  Fossil fuels
• How is energy transferred from a thermal store?


  By heating a room
• What type of energy store is created when a force is applied to a material?

  Plastic store
• What happens to gravitational energy when an object is pulled down?

  It decreases
• What increases as gravitational energy decreases?

  Kinetic energy
• What is the electric energy store used for?

  Transferring energy using electric current
• How are magnetic energy stores similar to electric energy stores?

  Both relate to thermal energy
• What is the principle behind energy conservation?

  Energy cannot be created or destroyed
• How did coal form according to the study material?

  From giant plants buried in swamps
• What process turns oil and gas from buried remains?

  High pressure over time
• What is pumped storage used for?

  Generating electricity by moving water
• How does pumped storage help with energy demand?

  Balances supply and demand
• What are the advantages and disadvantages of wave power?

  Advantages:

  • Renewable energy source
  • Free energy

  
  

  Disadvantages:

  • Not efficient
  • Expensive maintenance
  • Can lead to ocean graphing
• What are the advantages and disadvantages of wind power?

  Advantages:

  • Renewable energy source
  • No liquid emissions
  • Clean energy

  
  

  Disadvantages:

  • Unpredictable wind
  • Can disrupt wildlife
  • Large turbines needed
• What are the advantages and disadvantages of hydroelectric power?

  Advantages:

  • Renewable and sustainable
  • Generates lots of energy
  • Safe to operate

  
  

  Disadvantages:

  • Environmental impact
  • Requires large dams
  • Limited to specific locations
• What are the advantages and disadvantages of tidal power?

  Advantages:

  • Clean energy source
  • More reliable than wind

  
  

  Disadvantages:

  • Expensive to implement
  • Potential damage to marine life
  • Turbulent currents can be problematic
• What are the advantages and disadvantages of solar power?

  Advantages:

  • Cost-effective
  • Clean energy source
  • Abundant sunlight

  
  

  Disadvantages:

  • Location specific
  • Can cause mechanical problems
  • Requires large areas for solar cells
• What is the main characteristic of biomass/biofuels?

  Clean energy source
• What do fossil fuels release when burned?

  Carbon dioxide
• What is a major disadvantage of nuclear energy?

  Nuclear waste is highly reactive
• What percentage of global energy comes from fossil fuels?

  More than 80%
• What is the process of generating electricity from fossil fuels?

  Burning fuels to boil water for steam
• What energy stores are involved in electricity production from fossil fuels?

  Nuclear, thermal, kinetic, electrical energy
• What are the advantages and disadvantages of fossil fuels?

  Advantages:

  • Relatively cheap
  • High energy output
  • Easy to extract

  
  

  Disadvantages:

  • Produces pollution
  • Non-renewable resource
  • Safety risks and environmental impacts
• What is the main energy transfer involved in fossil fuels?

  Heating to electrical energy
• What is the role of turbines in electricity generation?

  Convert steam energy to electrical energy
• What is the primary source of greenhouse gas emissions globally?

  Fossil fuels
• What is the significance of energy transfers in heating?

  They convert energy from one form to another
• What is the role of mechanical energy in energy transfers?

  It is one form of energy transfer
• What is the impact of burning fossil fuels on the environment?

  It produces pollution and climate change
• How do energy sources differ in terms of renewability?

  Fossil fuels are non-renewable, others are renewable
• What is the first step in the fossil fuel process?

  Fossil fuel is burnt
• What happens after fossil fuel is burnt?

  Water is heated
• What is produced when water is heated in the fossil fuel process?

  Steam
• What triggers the turbine in the process?

  Steam turns the turbine
• What does the turbine trigger in the fossil fuel process?

  A generator
• What is the outcome of the generator in the process?

  Electricity supply is produced
• What happens to the steam after it is used?

  It is condensed back to water
• What is released from the cooling tower?

  Hot air
• What are the steps in the fossil fuel energy process?

  1. Fossil fuel is burnt
  2. Water is heated
  3. Steam is produced
  4. Steam turns the turbine
  5. Turbine triggers the generator
  6. Electricity supply is produced
  7. Steam is condensed back to water
  8. Hot air is released from the cooling tower