weak topics!!

• What are the two main types of heat transfer discussed?

  Conduction and convection
• In which materials does conduction primarily occur?

  Conduction occurs mainly in solids
• What is conduction?

  It is the process where vibrating particles transfer energy
• How is energy transferred to an object by heating?

  It is transferred to the thermal store of the object
• What happens to particles in the heated part of an object?

  They vibrate more and collide with each other
• What is thermal conductivity?

  It measures how quickly energy is transferred through a material
• In which states of matter does convection occur?

  In liquids and gases
• What is convection?

  It is where energetic particles move from hot to cool regions
• What happens to the density of a heated region in a liquid or gas?

  The density decreases as particles move faster
• What is wind power primarily generated by?

  Wind turbines
• Where are wind turbines typically placed?

  In exposed places like moors or coasts
• What do wind turbines produce?

  Electricity through a generator
• What is a disadvantage of wind turbines?

  They can spoil the view and be noisy
• What is a potential problem with wind power?

  Wind turbines may stop if the wind dies down
• What are the initial costs of wind power?

  They are high but have low running costs
• What do solar cells generate electricity from?

  Sunlight
• Where are solar cells often used?

  In remote places with limited energy options
• What is a disadvantage of solar power?

  It cannot increase output during high demand
• What is geothermal power derived from?

  Underground thermal energy sources
• Where is geothermal power possible?

  In volcanic areas with hot rocks near the surface
• What is a source of geothermal energy?

  The slow decay of radioactive elements
• What is a major advantage of geothermal energy?

  It is a free and reliable energy resource
• What is a disadvantage of geothermal power plants?

  There are few suitable locations for them
• How does hydro-electric power generate energy?

  From the kinetic store of falling water
• What is required for hydro-electric power generation?

  Flooding a valley by building a dam
• What is a disadvantage of hydro-electric power?

  It can impact the environment significantly
• What is an advantage of hydro-electric power?

  It can respond immediately to increased demand
• What is wave power generated by?

  Small wave-powered turbines around the coast
• What is a disadvantage of wave power?

  It can disturb marine habitats and seabeds
• What is tidal barrage energy generated from?

  The gravitational pull of the sun and moon
• What is a disadvantage of tidal barrages?

  They can prevent access by boats
• What are biofuels made from?

  Plants and waste
• What is a pro of biofuels?

  They are supposedly carbon neutral
• What is a con of biofuels?

  The cost to refine them is high
• What are non-renewable energy resources?

  Fossil fuels and nuclear fuel
• What are the three main fossil fuels?

  Coal, oil, and natural gas
• What is a characteristic of non-renewable resources?

  They are finite and will run out
• Why are fossil fuels considered reliable?

  They can meet current demand quickly
• What environmental problems do fossil fuels create?

  They release carbon dioxide and sulfur dioxide
• What is a problem associated with nuclear power?

  Nuclear waste is dangerous and hard to dispose of