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→Key Stage 5
: At '''absolute zero''' the [[pressure]] in a [[gas]] becomes zero.
: At '''absolute zero''' all the [[particle]]s in [[material]] stop moving, they have no [[Kinetic Energy Store|kinetic energy]].
===References===
====Edexcel====
:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Absolute zero, page 193, GCSE Physics, Pearson Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Absolute zero, page 204, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Absolute zero, page 425, GCSE Combined Science, Pearson Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Absolute zero, page 97, GCSE Physics; The Revision Guide, CGP, Edexcel '']
====OCR====
:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Absolute zero, page 35, Gateway GCSE Physics, Oxford, OCR '']
==Key Stage 5==
===Meaning===
[[Absolute Zero]] is the theoretical [[temperature]] at which a [[system]] reaches its minimum possible [[energy]], corresponding to 0 [[Kelvin|K]].
===About Absolute Zero===
*At [[Absolute Zero|absolute zero]], [[Molecule|molecular]] motion ceases.
*It is the baseline for the [[Kelvin]] [[temperature]] scale.
*[[Absolute Zero]] is equivalent to -273.15°C.
*[[Absolute Zero]] represents the lower limit of the thermodynamic temperature scale.
*Achieving [[Absolute Zero|absolute zero]] is impossible; it can only be approached asymptotically.
*At [[Absolute Zero|absolute zero]], the entropy of a perfect crystal is exactly zero, per the third law of thermodynamics.
*Near [[Absolute Zero|absolute zero]], quantum mechanical effects such as Bose-Einstein condensation can be observed.
*Laboratories use techniques such as laser cooling and evaporative cooling to reach temperatures close to [[Absolute Zero|absolute zero]].
===Examples===
*The coldest recorded [[temperature]] in a laboratory setting is a fraction of a [[kelvin]] above [[Absolute Zero|absolute zero]].
*Space probes use devices cooled to near [[Absolute Zero|absolute zero]] to detect faint [[infrared]] signals.
==Beyond the Curriculum==
{{#ev:youtube|https://www.youtube.com/watch?v=W6aL9YyRx1A}}