physics

• `what is fuel in nuclear power

  uranium or putonium
• what is method in nuclear power

  nuclear fission, splitting large nuclei releases lots of energy in a chain reaction
• when does nuclear power take place

  in the fuel rods in a nuclear
• what are the advantages of nuclear power

  . available for use

  . they give lots of energy

  . No Co2 is released so doesn't contribute to global warming

  . will last a very long time
• what are the disadvantages of nuclear power

  . will run out eventually

  . catastrophic explosion

  . non renewable

  . expensive to build

  . takes lots of effort to produce fuel

  . not reliable
• what are biofuels produced from

  plants
• what do plants absorb

  C02 from the atmosphere
• what are the advantages of biofuels

  . they are renewable

  . they are reliable
• what are the disadvantages of biofuels

  . they take up farm land which is used to grow food and crops

  . if the price increases, it could cost global shortages of food
• what are the advantages of wind and waves

  No C02 is released

  Energy is "free"
• what are the disadvantages of wind and waves

  . low energy is given

  . lots of space

  . expensive

  . danger

  . eyesore
• what are the advantages of hydroelectricity


  switched on very quickly for times

  very reliable

  NO C02 is released
• what are the disadvantages of hydroelectricity

  They can flood an area
• what is a non renewable resource

  a natural substance that is not replenished with the speed at which it is consumed. Its suply is finite
• what are the types of non-renewable resources called

  fossil fuels
• what are the fossil fuels

  oil, gas and coal
• what are the advantages of fossil fuels

  . gas can be produced in the uk

  . thermal power stations of very reliable

  . currently cheap
• what are the disadvantages of fossil fuels

  carbon dioxide is released which contributes to global warming

  they are not renewable
• what does tidal mean

  tidal water from the sea will flow into an estuary at high tide water can can be stored in an estuary
• what are the advantages of tidal energy

  . reservoir refills with the high tide
• what are the disadvantages of tidal energy

  flood damages to estuarys
• what is geothermal energy

  mantle of the earth is very hot
• what are the advantages of geothermal energy

  . reliable

  . renewable
• what are the disadvantages of geothermal energy

  can only be done in places where the earths mantle is thin- prone to earthquakes
• what is solar thermal

  light from the sun that delivers large amount of energy to the earths surface
• what are the advantages of solar energy

  they are more efficient than solar cells
• what are the disadvantages of solar energy

  they work best in sunny climates
• what are the advantages of solar cells

  there is no cost to keep them running
• what are the disadvantages of solar cells

  they only work in sunny climates

  they are currently inefficient ( only 10% of energy is converted)