2.3

• Unit of energy


  Joules (J)
• Gravitational potential energy (GPE)


  mass x gravity x height
• Kinetic energy (KE)


  0.5 x mass x speed²
• What happens when energy 'dissipates'

  Energy spreads out in all directions
• Energy transfer


  Energy moving from one store to another
• 8 stores of energy

  • Chemical
  • Kinetic
  • Gravitational
  • Elastic
  • Thermal
  • Magnetic
  • Electrostatic
  • Nuclear