Energy resources

• WHat is renweable energy?

  Energy from natural resources that always replenishes and never runs out
• What is non renewable energy?

  Cannot be replenished and will run out
• What properties can energy resources be compared by?

  • Source of energy
  • Energy released or generated
  • Costs
  • Impact on environment
• What is coal used for?

  • Generate electricity
  • Extraction of metals
  • Making steel
• What is oil used for?

  • Fuel for most vehicles
  • Heating
• What is Natural gas used for?

  • Generating electricity
  • Fuel for some vehicles
  • Heating
• How do fossil fuels contribute to global warming?

  WHen Fossil fuels are releases in a power station, carbon dioxide is released in the atmosphere which contributes to greenhouse gas
• What happens in a nuclear power station?

  • Inside a nuclear reactor, atoms undergo nuclear fission
  • This releases a huge amount of heat energy
  • Heat is used to create a steam that drives turbines
• What happens in a nuclear reactor?

  • Release of energy from unstable nuclei increases temperature in the core of reactor
  • This energy is transferred by a coolant
  • The coolant (usually water) flows from the core to a heat exchanger which transfers the energy to water
  • This will form steam to turn the turbines and generate electricity in the generator
• What is biomass?

  A renewable energy source made from lots of different living organisms
• 3 advantages to using biofuels?

  • Uses products whoch might of been wasted anyway
  • Power stations can supply hot water to houses
  • Carbon-neutral
• 3 Disadvantages to using biofuels?

  • Releases atmospheric pollutants
  • Land which could be used for food is used for biofuel power plants
  • Powerplants are ugly and ruin the attraction of a place
• What is a fuel?

  A source of energy
• What are 4 examples of non renewable energy resources?

  1. Oil
  2. Gas
  3. Wood
  4. Coal
• What are 4 examples of renewable energy sources?

  1. Tidal
  2. Wind
  3. Solar
  4. Biomass
• What are the advantages of using nuclear energy?

  • Can save lives
  • Is stored while fossil fuels are released in the air we breathe
  • Reduces carbon dioxide
  • New technologies render using nuclear energy is a lot mless dangerous
  • Cheap
  • Reliable
  • Produces huge amounts of energy
  • Produces small amountgs of waste
  • Does not contribute to environment
• What are the disadvantages of using nuclear energy?

  • Can't find a place to store the nuclear waste where it will be safe from earthquakes, flooding and terrorists etc
  • Accidents and disasters can happen
  • Lots of money has to be spent on safety and containing the radioactive waste
• Name two substances that pollute the environment when fuels are burnt

  1. Ash
  2. SMoke
• Is coal, oil or gas used for central heating boiler?

  Oil
• Is coal, oil or gas used for a cooker?


  Gas
• Describe how the energy stored in oil came from the sun?

  • Living things use energy from the sunto gow and oil is used from the remains of living things
• WHat are the 4 stages from when coal is burn to when electricity is generated?

  1. Coal is burnt
  2. Water changes to steam
  3. Steam turns a turbine
  4. Turbine generates electricity
• What is the useful energy when coal is burnt?

  Chemical energy to thermal energy
• Give the nae of one type of energy that is wasted when coal is burnt?

  Sound or light
• What is the original source of both fossil fuels and biomass?

  SUn
• Define carbon-neutral

  Removes as much carbon dioxide from the atmosphere as it releases
• 2 ways which biofuels are used

  • Transport
  • Electricity
• Give 3 sources of biofuels

  • Wood
  • Sugarcane
  • Methane gas
• One way why biofuels are not completely carbon-neutral

  • Forest is destroyed for biofuel crops
• Give 3 similarities between a fossil fuel power plant and a nuclear power plant

  1. Energy transferred from fuel
  2. By heating
  3. To produce steam which turns turbine
• One difference between a fossil fuel power plant and a nuclear power plant

  1. Nuclear fuel isn't burnt
• Name one application that biofuel and fossil fuels can be used for but nuclear fuel can't

  Transport
• What is a wind turbine?

  Renewable energy device where blades are attached to a generator on a tall and narrow tower
• How does a wind turbine work (simple)?

  A wind turbine is driven by wind to drive a generator to produce electricity for a building.
• WHat is a wind farm?

  A wind farm is when wind turbines are connected together to produce a large amount of electricity for a town/village
• How does wind work?

  Wind is moving air caused by differences in atmospheric pressure
• How is energy derived from the wind?

  Converting the air's motion to mechanical energy
• What are the 3 energy transfers in a wind turbine?

  1. Wind= Kinetic energy store
  2. Turbines= Kinetic energy store
  3. Generator= ELectric current (pathway)
• What are some advantages to wind power?

  • NO pollutant gases
  • No Carbin dioxide emissions
  • Renewable
  • Low running cost
• What are some disadvantages of wind power?

  • Unreliable: wind varies
  • Noise pollution
  • Unsightly
  • May kill birds
  • Capital cost is high