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Year 7 & 8 TOC

Obtaining energy

Renewable resources for energy

LO: Comparing renewable and non-renewable energy sources, including how they are used in a range of situations.

Resources can be a source of energy. There are many different types of resources and methods for converting them into energy that we can use in our homes, manufacturing and every day life. 


  1. What are some types of renewable resources
  2. How can we use different types of renewable resources to generate electricity 
  3. What are some pros and cons of each renewable energy

Play each of the videos below and take note of the pros & cons and key points for each method of renewable energy. 

Geothermal energy

  • Renewable
  • Free
  • Little pollution
  • Constant supply
  • Can only be found in certain locations
  • Power stations may be at risk from earthquakes
  • Sulphuric gases can sometimes given off

– Magma is a super hot liquid deep beneath the Earth.

– As the magma heats up the rocks around it, this heat turn water to steam. 

– The steam is funneled through pipes to turn turbines and generate power

– Geothermal resources can be used to heat houses and generate electricity

Tidal energy

  • Waves and tide are free
  • Tides can be timed – regular supply
  • Little pollution 
  • Safe
  • Wave energy expensive and difficult to transport energy to shore
  • Tidal barrages may affect marine  habitats 
  • Affects shipping
  • Tidal barrages are expensive

– Tidal power uses the movement of waves to generate electricity.

– As the tide changes, the movement turns the turbines. 

Hydroelectric power

  • Little pollution
  • Produced in area where few people live
  • Dams can reduce risk of flooding and water shortage
  • Lake used for water sports
  • Expensive to build
  • Flood large area and destroys the environment
  • silt stays in reservoir rather than helping to fertilise nearby land
  • Methane and carbon dioxide given off by rotting vegetation in lake
  • Fish cannot migrate easily upstream

Currently, Hydropower accounts for around 19% of the worlds energy production and roughly 4.5 % of our needs. The two many hydroelectric power plants are in Tasmania and the snow mountains (NSW).

– Hydro electric power uses falling water to produce energy.

– Water is released from high up and crash down on the turbines, turning them and generating power.

– This means they require constant water supply and are often in high-altitude areas. This is why Dams are so useful in generating energy.  

Solar energy

  • No pollution
  • Can be used in remote areas
  • Usually produced where it is used
  • easy to install
  • Expensive to set up 
  • You need a large number of panels and a large area of land
  • Energy only produced during daylight
  • Depends on climate conditions

You may have seen small solar panels around, on traffic light, outdoor lighting and speed limit signs. However, in order to generate meaningful amounts of electricity, we create solar farms. Solar power stations are becoming increasingly popular around the world and especially in Australia. We are set to build our largest solar farm in Queensland, Harlin Solar Farm, which should be able to generate 1,500 Mega Watts of electricity! 

– Solar dose not require a turning turbine to generate electricity.

– Solar energy is made when solar cells convert sunlight into electrical energy.

Germany and Spain have massive solar power stations. In fact Germany broke the world record for most energy generated by solar power with 20 Giga Watts!!

That’s enough to charge your iPhone 4,000,000,000 times or power 2200 million LED light bulbs and is the equivalent of 26 million horse power!!

Wind power

  • Little pollution 
  • Cheap to produce energy
  • Land below can be used for other things
  • Wind doesn’t always blow
  • Noise pollution 
  • Environmental impact

– Wind power does not rely on producing steam to turn a turbine. Instead it use the wind to turn it. 

– The stronger the wind, the more energy is produced.

– We place many of them in long rows, called these wind farms, where there are frequent strong winds


Click and drag the boxes into their correct category. You can place the same box into multiple categories.

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