4.3 understand that energy is conserved

KEY IDEA: The conservation of energy

  • Energy (and matter) is neither created or destroyed, it is converted from one form to another.
  • The total amount of energy present stays the same before and after any changes.
  • Think about energy like money, you can’t create money, but you can ‘trade in’ your money – converting it to another form (the thing you bought)
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