Energy

• Potential Energy


  Stored energy. More energy with: more mass, and higher up

  
• Kinetic Energy


  Energy of movement. More energy with: more mass, and faster movement

  
• Electrical Energy


  Energy through moving electrons using wires.

  
• Chemical Energy


  Energy stored in bonds. Food, explosives and batteries.

  
• Thermal Energy


  Heat energy

  
• Sound Energy


  Energy through the vibrations of waves.

  
• Electromagnetic/Light Energy


  Energy through light.

  
• Nuclear Energy


  Energy in the nucleus of atoms

  
• Light Energy


  Energy from light waves

  
• Work Done


  = force applied x distance moved
• Weight


  Mass x Gravitational field strength
• Gravitational potential (Ep)


  mass x gravity x height
• Kinetic Energy (Ek)


  0.5 x mass x velocity(squared)
• Power


  Energy transferred x Time taken
• Specific Heat Capacity


  Heat energy / mass x temp change
• Heat energy


  mass x temp change x specific heat capacity
• Efficiency


  useful energy out / total energy in (x100%)
• Independent Variable


  The variable you choose to change
• Dependent Variable


  The variable that changes because of what you changed. (what you write in your results table)
• Control Variable


  The things you keep the same.
• Gravitational field strength


  Gravitational potential (Ep) / mass x height
• Wasted Energy


  The energy transfer that is not wanted by an appliance
• Renewable Resources


  Resources that can be used again/ will not run out
• Non-renewable Resources


  Resources that cannot be got back once they have been used