Transcript File
Biomass Burning biomass produces CO2, so why are these power stations sometimes described as carbon neutral? (Think about what plants use to photosynthesis.) Name 3 examples of biomass fuels? (Usually things that are grown or certain waste products). 1._____________ 2. _____________ 3. _____________ World Energy Use Which countries use most energy ? Explain some of these reasons why. Make a list of activities that contribute to your carbon footprint. Which countries energy use is increasing most rapidly and why? Make a list of ways to reduce personal carbon footprints. Why can we say that people in the UK are responsible for some of China’s carbon emissions? (Where is your phone made?) Why do renewable power stations that do not burn fossil fuels still have a carbon footprint? (Think about how they are built and what they’re made of.) Fossil fuels Name three fossil fuels: 1___________ 2___________ 3__________ Give two reasons why many experts believe we should reduce fossil fuel use. Efficiency Power supplied to a lightbulb is 60W. 23W of useful light energy is produced each second what is it’s % efficiency?: Why is a combined heat and power station burning fossil fuel more efficient than an ordinary fossil fuel power station? (What can we use from it.) GENERATING ELECTRICITY Label the parts of a power station: ______________________________________________ Power In an electrical circuit write the formula used to calculate Power using Current and Voltage. Power = What is the formula for power in terms of energy and time? RENEWABLE ENERGY 1. ______________________ 2. ______________________ 3. ______________________ 4. ____ - __ _____________ Come up with 3 renewable sources of energy which are alternatives to fossil fuels or nuclear power... What is the UK mains voltage ? ______V Energy Source Advantage What is the current through a 60W lightbulb plugged into a UK mains socket? Power = Voltage x Current How does a generator work? Use the diagram to explain. What are the advantages and disadvantages of nuclear power? Disadvantage Power = What are kilowatt hours (kWh) measuring?______________ An electric drill is rated 500W. It produces 200W as kinetic energy, 200W as heat and 100W as sound. Draw a labelled Sankey diagram to represent this.