Newton's Law of conservation of energy: Energy cannot be created or destroyed But it can be changed from one form to another. Chemical energy in food is converted to heat energy and kinetic energy by our bodies. Energy transfer What other energy transfers can you think of? Potential energy in a ball is converted to kinetic energy when it falls to the ground.
bunsen burner portable torch microphone battery radio television car chemical to heat and light sound to electrical Chemical to electrical to sound and heat electrical to sound and light and heat chemical to kinetic and sound and heat In all these transfers the energy is not lost, it is conserved. Energy cannot be destroyed or created. What energy changes takes place in each device? What is the energy transfer?
Ireland has a energy problem.. 90% of electricity we use comes from burning fossil fuels… The disadvantages of fossil fuels: 1)They are non renewable (and running out!) 2) When fossil fuels are burnt they release carbon dioxide into the air which causes global warming!
Renewable sources of energy Biomass energy Wave and tidal energy Wind energy Geothermal energy Solar energy Renewable energy resources will not run out because they can easily be made
Nuclear energy is made from uranium (at the moment) which will eventually run out!
Advantages/ Disadvantages of Nuclear energy Advantages It releases great amounts of energy. No greenhouse gases are released by nuclear power plants. Disadvantages Releases radioactive waste which can be dangerous to the environment if not disposed of properly. If a nuclear accident happened it would cause a lot of environmental damage.
Group work Make lists of the advantages and disadvantages of each energy source Evaluate the other sources of energy we could use in Ireland to make electricity
Fossil fuels Electricity WIND WAVES SOLAR PANELS PLANTS ANIMALS PLASTICSGAS PETROL TURBINES THE SUN
The sun is our primary source of energy! The energy that comes from the sun is changed into lots of different types of energy that we can use!
Conserving energy Insulate with fibreglass Double glaze and use thick curtains Use draught excluders Use thick carpets Fit walls with air cavities Energy Conservation (Saving energy)