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==Key Stage 3==
===Meaning===
To '''compress''' is to make something shorter or smaller in [[Volume (Space)|volume]] by applying a [[force]].
===About Compression===
==Key Stage 4==
===Meaning===
To '''compress''' is to make something shorter of smaller in [[Volume (Space)|volume]] by applying a [[force]].
===About Compression===
: [[Gas]] can be '''compressed''' easily but [[solid]]s and [[liquid]]s cannot be '''compressed''' because the [[particle]]s in a [[solid]] and [[liquid]] are already touching.
: A [[Coil Spring|spring]] can be '''compressed''' to become shorter due to pair of [[Equilibrium Force|equilibrium forces]].
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Compression, page 159, GCSE Physics; Third Edition, Oxford University Press, AQA '']
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Compression, pages 176-7, 194, 206, 210, 212, 257, GCSE Physics; Student Book, Collins, AQA '']
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Compression; of gas, page 99, GCSE Physics; Student Book, Collins, AQA '']
====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 ''Compression, page 182, GCSE Physics, Pearson 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 ''Compression, page 414, GCSE Combined Science, Pearson Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Compressions (waves), pages 88, 89, 103, 104, GCSE Physics, 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 ''Compressions, pages 136, Gateway GCSE Physics, Oxford, OCR '']