Changes

: 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 [[Dissipated Energy|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]].

===References===

:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Conservation of energy, page 202, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']

:[https://www.amazon.co.uk/gp/product/1782945687/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945687&linkCode=as2&tag=nrjc-21&linkId=9a598e52189317a20311d7a632747bc9 ''Conservation of energy, page 82, Gateway GCSE Physics; The Revision Guide, CGP, OCR '']