unit 2 Energy

unit 2 Energy

1. where does it come from?

   • finite materials
     • coal
   • fossil fuels
     • gas
   • non renewable
     • oil

2. fracking

   • injected into well
     • sand
     • water
     • chemicals
   • materials forced down
     • push gas back up
   • dislodges
     • loose shale
       • freeing up the gas

3. wind power

   • wind turbines
     • eye sore
     • only workwhen windy
     • hazard to birds
     • noise
     • low maintenance
     • clean energy
     • higher winter output
     • low cost energy

4. solar energy

   • produces energy from sun
   • solar panels
     • use photovoltaic cells
     • low maintenance
     • clean energy
     • relatively low-cost
     • seasonal fluctations
     • no power generated at night
     • complex positioning issues