20,345
edits
Changes
no edit summary
*The [[atmosphere]] is less [[density|dense]] - Less frequent [[collision]]s between the [[particle]]s and the surface of the [[object]].
*The [[temperature]] is colder - [[Particle]]s move more slowly leading to less [[collision]]s and the [[collision]]s which do happen occur with less [[force]].
==Key Stage 4==
===Meaning===
'''Atmospheric Pressure''' is the [[pressure]] on an [[object]] due to the [[particle]]s of [[gas]] in the [[atmosphere]] [[collide|colliding]] with the [[object]].
===About Atmospheric Pressure===
: '''Atmospheric Pressure''' changes with '''height''' above the [[Earth]]s surface. The higher up, the lower the [[pressure]].
: The '''atmospheric pressure''' at [[Sea Level|sea level]] is 101,000Pa.
: The [[force]] responsible for '''atmospheric pressure''' is the [[weight]] of all the [[particle]]s above the [[object]].
===Variation with Height===
: As the height of an [[object]] increases the '''atmospheric pressure''' decreases.
: [[Fluid Pressure|Pressure]] in a [[fluid]] is due to the [[weight]] of the [[fluid]] above the [[object]]. As an [[object]] gets higher, there is less [[atmosphere]] above that [[object]].
: The reduction in [[pressure]] is related to the [[density]] and motion of [[particle]]s in the [[atmosphere]].
At higher altitudes:
*The [[atmosphere]] is less [[density|dense]] - Less frequent [[collision]]s between the [[particle]]s and the surface of the [[object]].
*The [[temperature]] is colder - [[Particle]]s move more slowly leading to less [[collision]]s and the [[collision]]s which do happen occur with less [[force]].
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Atmospheric pressure, page 120-1, GCSE Chemistry; Student Book, Collins, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Atmospheric pressure, page 139, GCSE Physics, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Atmospheric pressure, page 171, GCSE Physics; The Complete 9-1 Course for AQA, CGP, 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 ''Atmospheric pressure, pages 166-167, 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 ''Atmospheric pressure, pages 174-5, GCSE Physics; Student Book, Collins, AQA '']
:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac23 ''Atmospheric pressure, pages 41, 59, GCSE Physics; The Revision Guide, CGP, AQA '']