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==Key Stage 3==
===Meaning===
[[Conservation of Energy]] is a [[Physical Law]] that states that "Energy cannot be created or destroyed it can only be transferred from one store into another".
===About Conservation of Energy===
: '''Conservation of Energy''' is important when calculating [[Energy Transfer|energy transfers]].
: The total [[energy]] in a closed [[system]] must remain the same, so when one [[Energy Store|energy store]] loses [[energy]] other [[Energy Store|energy stores]] must gain that amount of [[energy]].
==Key Stage 4==
===Meaning===
[[Conservation of Energy]] is a [[Physical Law]] that states that "Energy cannot be created or destroyed it can only be transferred from one store into another".
===About Conservation of Energy===
: '''Conservation of Energy is important when calculating [[Energy Transfer|energy transfers]].
: The total [[energy]] in a closed [[Closed Isolated System|closed isolated system]] must remain the same, so when one [[Energy Store|energy store]] loses [[energy]] other [[Energy Store|energy stores]] must gain that amount of [[energy]].: If a [[system]] is an [[Open System|open system]] [[energy]] can leave the [[system]], but the [[energy]] is not destroyed.: In a [[Closed Isolated System|closed isolated system]] [[energy]] can be [[dissipate]]d, which means it is still in the [[system]] but is [[Wasted Energy|wasted]] and cannot be recovered to perform useful [[Work Done|work]].