Do now! Can you remember all the different types of energy we discussed last lesson?

Remember last lesson? We looked at types of energy and energy changes HeatChemical LightElastic KineticGravitational SoundNuclear Electric

Energy Changes In a light bulb Electric Light + heat

Where do we get the energy we use from?

Energy sources!

Can you give me some examples?

Sure Homer!

Fossil Fuels Coal, oil or gas. Why are they called fossil fuels?

Fossil fuels The fuels are burnt. The heat is used to heat water to produce steam. The moving steam turns a turbine (“propeller”), which turns a generator, which produces electricity. Energy changes?

Fossil fuels ChemicalHeatkineticelectric Stored in the fuel When the fuel is burnt Moving steam and turbine Produced by the generator

Nuclear energy Rods of uranium brought close together produce heat. The heat is used to heat water to produce steam, the moving steam turns a turbine (“propeller”), which turns a generator, which produces electricity. Energy changes?

Nuclear energy Nuclearheatkineticelectric “stored” in the uranium atoms Released by the uranium atoms Moving steam and turbine Produced by the generator

Hydroelectricity Water is stored high up in mountains. The water is allowed to flow down the mountain in a pipe. The moving water is used to turn a turbine (“propeller”), which turns a generator, which produces electricity. Energy changes?

Hydroelectricity Gravitationalkineticelectric “stored” in the high water Moving water and turbine Produced by the generator

Wind power Wind is used to turn a turbine (“propeller”), which turns a generator, which produces electricity. Energy changes?

Wind power kineticelectric Wind and turbine Produced by the generator

Solar power Either sunlight shines on solar cells which produce electricity, or light shines on solar panels which simply heat water Lightelectric or Lightheat

Biomass Using plants for fuel. Sugar cane in Brazil is distilled to make alcohol which is used in cars. Energy changes?

Biomass Lightchemicalheatkinetic From the sun Stored in the plant and alcohol When burnt in the engine Moving car

Other energy sources Geothermal Tidal Wave Nuclear fission We’ll look at these in more detail in year 10

Let’s try some questions!