Difference between revisions of "Atmospheric Pressure"
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| + | :[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 ''Atmospheric pressure, pages 38-39, Gateway GCSE Physics, Oxford, OCR ''] | ||
Latest revision as of 17:39, 30 November 2019
Contents
Key Stage 3
Meaning
Atmospheric Pressure is the pressure on an object due to the particles of gas in the atmosphere colliding with the object.
About Atmospheric Pressure
- Atmospheric Pressure changes with height above the Earths surface. The higher up, the lower the pressure.
- The atmospheric pressure at sea level is 101,000Pa.
- The force responsible for atmospheric pressure is the weight of all the particles above the object.
Variation with Height
- As the height of an object increases the atmospheric pressure decreases.
- 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 particles in the atmosphere.
At higher altitudes:
- The atmosphere is less dense - Less frequent collisions between the particles and the surface of the object.
- The temperature is colder - Particles move more slowly leading to less collisions and the collisions which do happen occur with less force.
Key Stage 4
Meaning
Atmospheric Pressure is the pressure on an object due to the particles of gas in the atmosphere colliding with the object.
About Atmospheric Pressure
- Atmospheric Pressure changes with height above the Earths surface. The higher up, the lower the pressure.
- The atmospheric pressure at sea level is 101,000Pa.
- The force responsible for atmospheric pressure is the weight of all the particles above the object.
Variation with Height
- As the height of an object increases the atmospheric pressure decreases.
- 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 particles in the atmosphere.
At higher altitudes:
- The atmosphere is less dense - Less frequent collisions between the particles and the surface of the object.
- The temperature is colder - Particles move more slowly leading to less collisions and the collisions which do happen occur with less force.
References
AQA
- Atmospheric pressure, page 120-1, GCSE Chemistry; Student Book, Collins, AQA
- Atmospheric pressure, page 139, GCSE Physics, Hodder, AQA
- Atmospheric pressure, page 171, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
- Atmospheric pressure, pages 166-167, GCSE Physics; Third Edition, Oxford University Press, AQA
- Atmospheric pressure, pages 174-5, GCSE Physics; Student Book, Collins, AQA
- Atmospheric pressure, pages 41, 59, GCSE Physics; The Revision Guide, CGP, AQA
Edexcel
- Atmospheric pressure, page 102, GCSE Physics; The Revision Guide, CGP, Edexcel
- Atmospheric pressure, page 202, GCSE Physics, Pearson Edexcel
- Atmospheric pressure, page 319, GCSE Physics, CGP, Edexcel