Difference between revisions of "SI Unit"
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===About SI Units=== | ===About SI Units=== | ||
: '''SI''' stands for "Système international". | : '''SI''' stands for "Système international". | ||
− | : '''SI''' [[unit]]s have been standardised around the world so that any [[experiment]] can be [[ | + | : '''SI''' [[unit]]s have been standardised around the world so that any [[experiment]] can be [[reproducible|reproduced]] and so that components in machines are interchangeable. |
− | : The | + | : The USA does not always use '''SI Units'''. As a result of the confusion over [[unit]]s a space probe once crashed on [[Mars]] because one team of [[scientist]]s was using [[inch]]es and the other team was using hundredths of [[metre]] ([[centimetre]]s) and a mistake was made converting from one to the other. |
+ | |||
+ | The '''SI Units''' you should know are in the following table: | ||
+ | |||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | |'''Measurement''' | ||
+ | |'''SI Unit''' | ||
+ | |- | ||
+ | |Distance, Displacement, Wavelength | ||
+ | |metres | ||
+ | |- | ||
+ | |Time | ||
+ | |seconds | ||
+ | |- | ||
+ | |Temperature | ||
+ | |degrees Celsius or Kelvin | ||
+ | |- | ||
+ | |Mass | ||
+ | |kilograms | ||
+ | |- | ||
+ | |Area | ||
+ | |metres squared | ||
+ | |- | ||
+ | |Volume | ||
+ | |metres cubed | ||
+ | |- | ||
+ | |Force, Weight | ||
+ | |Newtons | ||
+ | |- | ||
+ | |Speed and Velocity | ||
+ | |metres per second | ||
+ | |- | ||
+ | |Density | ||
+ | |kilograms per metre cubed | ||
+ | |- | ||
+ | |Angle | ||
+ | |degrees | ||
+ | |- | ||
+ | |Acceleration | ||
+ | |metres per second per second | ||
+ | |- | ||
+ | |Moment | ||
+ | |Newton Metres | ||
+ | |- | ||
+ | |Energy, Work Done | ||
+ | |Joules | ||
+ | |- | ||
+ | |Electrical Charge | ||
+ | |Coulombs | ||
+ | |- | ||
+ | |Electrical Current | ||
+ | |Amps | ||
+ | |- | ||
+ | |Potential Difference | ||
+ | |Volts | ||
+ | |- | ||
+ | |Resistance | ||
+ | |Ohms | ||
+ | |- | ||
+ | |Radioactivity | ||
+ | |Becquerels | ||
+ | |- | ||
+ | |Radiation Dose | ||
+ | |Ohms | ||
+ | |- | ||
+ | |Frequency | ||
+ | |Hertz | ||
+ | |- | ||
+ | |Magnetic Flux Density | ||
+ | |Teslas | ||
+ | |- | ||
+ | |Moles | ||
+ | |Mol | ||
+ | |- | ||
+ | |Concentration | ||
+ | |Mol per decimeter cubed | ||
+ | |- | ||
+ | |Light intensity | ||
+ | |Lux | ||
+ | |} | ||
+ | |||
+ | ===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 ''SI system of units, pages 266-267, GCSE Physics; Third Edition, Oxford University Press, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''SI units, page 175, GCSE Combined Science Trilogy 1, Hodder, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''SI units, page 19, GCSE Biology, CGP, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1782946381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946381&linkCode=as2&tag=nrjc-21&linkId=5ec5fc3f6429e30c1d9ab9bca2bccf93 ''SI units, page 19, GCSE Combined Science Trilogy; Biology, CGP, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''SI units, page 62, GCSE Chemistry, Hodder, 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 ''SI units, page 64, GCSE Physics, Hodder, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''SI units, page 8, GCSE Biology; The Revision Guide, CGP, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''SI units; interconversion of, pages 193-4, GCSE Combined Science Trilogy 1, Hodder, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Si units; interconversions of, pages 95-6, GCSE Chemistry, Hodder, AQA ''] | ||
+ | |||
+ | ====Edexcel==== | ||
+ | |||
+ | :[https://www.amazon.co.uk/gp/product/1782948147/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948147&linkCode=as2&tag=nrjc-21&linkId=f63dcd8345f4e49c717b39a228a36c7c ''SI units, page 18, GCSE Chemistry, CGP, Edexcel ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1782948120/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948120&linkCode=as2&tag=nrjc-21&linkId=dedef775c6a43dbb0a609441525adac0 ''SI units, page 19, GCSE Biology, CGP, Edexcel ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1292120207/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120207&linkCode=as2&tag=nrjc-21&linkId=22455ff53961978667722edaa64c0be5 ''SI units, page 3, GCSE Biology, Pearson, Edexcel ''] | ||
+ | |||
+ | ====OCR==== | ||
+ | :[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''International system of units (SI units), pages 5, 301, Gateway GCSE Chemistry, Oxford, 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 ''Si units, pages 49, 285-286, Gateway GCSE Physics, Oxford, OCR ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''SI units, pages 5, 301, Gateway GCSE Chemistry, Oxford, OCR ''] | ||
+ | |||
+ | ==Beyond the Curriculum== | ||
+ | {{#ev:youtube|https://www.youtube.com/watch?v=7bUVjJWA6Vw}} |
Latest revision as of 16:20, 19 December 2019
Contents
Key Stage 4
Meaning
SI Units are the standard scientific units used by scientists around the world.
About SI Units
- SI stands for "Système international".
- SI units have been standardised around the world so that any experiment can be reproduced and so that components in machines are interchangeable.
- The USA does not always use SI Units. As a result of the confusion over units a space probe once crashed on Mars because one team of scientists was using inches and the other team was using hundredths of metre (centimetres) and a mistake was made converting from one to the other.
The SI Units you should know are in the following table:
Measurement | SI Unit |
Distance, Displacement, Wavelength | metres |
Time | seconds |
Temperature | degrees Celsius or Kelvin |
Mass | kilograms |
Area | metres squared |
Volume | metres cubed |
Force, Weight | Newtons |
Speed and Velocity | metres per second |
Density | kilograms per metre cubed |
Angle | degrees |
Acceleration | metres per second per second |
Moment | Newton Metres |
Energy, Work Done | Joules |
Electrical Charge | Coulombs |
Electrical Current | Amps |
Potential Difference | Volts |
Resistance | Ohms |
Radioactivity | Becquerels |
Radiation Dose | Ohms |
Frequency | Hertz |
Magnetic Flux Density | Teslas |
Moles | Mol |
Concentration | Mol per decimeter cubed |
Light intensity | Lux |
References
AQA
- SI system of units, pages 266-267, GCSE Physics; Third Edition, Oxford University Press, AQA
- SI units, page 175, GCSE Combined Science Trilogy 1, Hodder, AQA
- SI units, page 19, GCSE Biology, CGP, AQA
- SI units, page 19, GCSE Combined Science Trilogy; Biology, CGP, AQA
- SI units, page 62, GCSE Chemistry, Hodder, AQA
- SI units, page 64, GCSE Physics, Hodder, AQA
- SI units, page 8, GCSE Biology; The Revision Guide, CGP, AQA
- SI units; interconversion of, pages 193-4, GCSE Combined Science Trilogy 1, Hodder, AQA
- Si units; interconversions of, pages 95-6, GCSE Chemistry, Hodder, AQA
Edexcel
- SI units, page 18, GCSE Chemistry, CGP, Edexcel
- SI units, page 19, GCSE Biology, CGP, Edexcel
- SI units, page 3, GCSE Biology, Pearson, Edexcel