energy

• kinetic


  moving objects have kinetic energy
• gravitational potential


  objects gain energy in their gravitational potential store when they are lifted through a gravitational field
• elastic potential


  objects have energy in their elastic potential store if they are squashed, stretched or bent
• magnetic


  magnetic materials interacting with one another have energy in their electrostatic store
• chemical


  chemical reactions transfer energy into or away from a substances chemical store
• nuclear


  atomic nuclei release energy from their nuclear store during nuclear reactions
• thermal


  all objects have energy in their thermal store, the hotter the object, the more energy it has in this store
• Mechanical transfer – when energy is transferred between stores by movement

  Electrical transfer – when energy is transferred between stores due to an electrical current

  Thermal transfer – when energy is transferred between stores due to a temperature difference

  Transfer by radiation. – when energy is transferred between stores by light.
• endothermic reactions


  when a rection absorbs heat energy from its surroundings
• exothermic reactions


  when reactions give out heat energy to its surroundings
• what does breaking bonds require?

  energy
• what does making bonds do?

  releases energy