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Difference between pages "Earth's Atmosphere" and "Accurate"

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==Key Stage 3==
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==Key Stage 4==
 
===Meaning===
 
===Meaning===
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'''Earth's Atmosphere''' is a [[mixture]] of [[gas]]es covering the surface of the [[Earth]].
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[[Results]] are [[accurate]] if they are close to the true value.
 +
 
 +
===About Accuracy===
 +
: [[Accuracy]] is achieved by:
 +
:*Removing [[Systematic Error|systematic errors]] from the [[reading]]s.
 +
:*Removing [[Zero Error|zero errors]] by [[Calibration|calibrating]] [[Measuring Instrument|instruments]] before the [[investigation]].
 +
:*[[Control Variable|Controlling]] all the [[variable]]s except for the [[Independent Variable|independent variable]] and the [[Dependent Variable]].
 +
: If there are [[Random Error|random errors]] and a small [[Sample Size|sample size]] taking [[repeat]] [[reading]]s, removing [[anomaly|anomalies]] and calculating an [[Mean Average|average]] can improve the '''accuracy'''.
 +
: If there are [[Systematic Error|systematic error]]s or [[Zero Error|zero errors]] the [[results]] can be improved by finding the source of the [[error]] and correcting it.
 +
 
 +
===Accuracy vs Precision===
  
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===About the Earth's Atmosphere===
 
 
{| class="wikitable"
 
{| class="wikitable"
 +
|+ Experimental Measurements of [[pi]]
 
|-
 
|-
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|[[File:AtmosphericGases.png|center|400px]]
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| style="height:20px; width:100px; text-align:center;" |'''Method'''
 +
| style="height:20px; width:100px; text-align:center;" |'''Test 1'''
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| style="height:20px; width:100px; text-align:center;" |'''Test 2'''
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| style="height:20px; width:100px; text-align:center;" |'''Test 3'''
 +
| style="height:20px; width:100px; text-align:center;" |'''Average'''
 +
| style="height:20px; width:100px; text-align:center;" |'''Range'''
 
|-
 
|-
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| style="height:20px; width:200px; text-align:center;" |A [[Pie Chart]] showing the percentage of different [[gas]]s in the '''Earth's Atmosphere'''.
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| style="height:20px; width:100px; text-align:center;" |Method 1
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|}
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| style="height:20px; width:100px; text-align:center;" |3.27
 +
| style="height:20px; width:100px; text-align:center;" |3.09
 +
| style="height:20px; width:100px; text-align:center;" |3.01
 +
| style="height:20px; width:100px; text-align:center;" |3.12
 +
| style="height:20px; width:100px; text-align:center;" |0.26
 +
|-
 +
| style="height:20px; width:100px; text-align:center;" |Method 2
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| style="height:20px; width:100px; text-align:center;" |3.91
 +
| style="height:20px; width:100px; text-align:center;" |3.88
 +
| style="height:20px; width:100px; text-align:center;" |3.88
 +
| style="height:20px; width:100px; text-align:center;" |3.89
 +
| style="height:20px; width:100px; text-align:center;" |0.03
 +
|-
 +
| style="height:20px; width:100px; text-align:center;" |Method 3
 +
| style="height:20px; width:100px; text-align:center;" |3.57
 +
| style="height:20px; width:100px; text-align:center;" |2.89
 +
| style="height:20px; width:100px; text-align:center;" |2.93
 +
| style="height:20px; width:100px; text-align:center;" |3.13
 +
| style="height:20px; width:100px; text-align:center;" |0.68
 +
|-
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| style="height:20px; width:100px; text-align:left;" colspan = "6"|
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: The number [[pi]] is 3.14159265359 correct to 12 [[Significant Figures|significant figures]].
  
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: The '''Earth's Atmosphere''' is essential to the survival of many [[Alive|living]] creatures on the [[planet]].
+
Method 1: The most [[accurate]] [[measurement]]s because they are the closest to [[pi]] but they are not very [[precise]] because they have a [[range]] of 0.26.
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: The '''Earth's Atmosphere''' has not always had the same proportions of [[gas]]es. 3.9 billion [[year]]s ago there was no [[Oxygen]] in the [[atmosphere]]. In the last 200 years humans have caused the [[Carbon Dioxide]] in the '''Earth's Atmosphere''' to double.
 
  
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==Key Stage 4==
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Method 2: These are the least [[accurate]] [[measurement]]s because they are the furthest from [[pi]] but they are very [[precise]] because they have a [[range]] of only 0.03.
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===Meaning===
 
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'''Earth's Atmosphere''' is a [[mixture]] of [[gas]]es covering the surface of the [[Earth]].
 
  
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===About the Earth's Atmosphere===
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Method 3: Each [[measurement]] is not [[accurate]] because they are far from [[pi]], they are also the least [[precise]] because they have a range of 0.68. However, the [[Mean Average|average]] is the most [[accurate]] as it is the closes to [[pi]].
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: The '''Earth's Atmosphere''' is around 79% [[Nitrogen]], 20% [[Oxygen]] 1% [[Argon]] and 0.04% [[Carbon Dioxide]]. However, these [[percentage]]s vary depending on the [[humidity]] as [[Water Vapour]] can make up some of the '''Earth's Atmosphere'''.
+
|}
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: The '''Earth's Atmosphere''' [[Thermal Insulator|insulate]]s the [[Earth]] keeping the surface at a higher [[Mean Average|average]] [[temperature]] than if it did not have an [[atmosphere]].
 
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: The '''Earth's Atmosphere''' protects [[organism]]s on the surface from harmful [[Cosmic Ray|cosmic rays]] and solar wind.
 
  
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===Formation of the Earth's Atmosphere===
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{{#ev:youtube|https://www.youtube.com/watch?v=hRAFPdDppzs}}
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: The '''Earth's Atmosphere''' formed 3.9 billion [[year]]s ago.
 
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: [[Scientist]]s believe the '''Earth's Atmosphere''' was formed from [[gas]]es released from [[Volcano]]es on the early [[Earth]].
 
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: [[Gas]] from the early [[Earth]] has been trapped in small bubbles in volcanic [[rock]] showing it be mostly [[Carbon Dioxide]], [[Methane]] and [[Nitrogen]]. Some evidence also suggests there may have been high quantities of [[ammonia]].
 
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: If there had been any [[Oxygen]] in the early '''atmosphere''' it would have reacted with the [[Methane]] to produce [[Carbon Dioxide]] and [[Water]] or any [[Reactivity Series|reactive]] [[metal]]s to produce [[Metal Oxide|metal oxides]].
 
  
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===Evolution of the Earth's Atmosphere===
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===References===
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: Once [[organism]]s [[Evolution by Natural Selection|evolved]] which could get [[energy]] from sunlight via [[photosynthesis]] the [[Carbon Dioxide]] in the '''atmosphere''' decreased and [[Oxygen]] began to increase.
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====AQA====
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: [[Carbon Dioxide]] was also removed from the '''atmosphere''' when it [[dissolve]]d in the [[ocean]] and was used by some sea [[organism]]s to form hard [[Calcium Carbonate]] shells.
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:[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 ''Accuracy (of results), page 5, GCSE Biology; The Revision Guide, CGP, AQA'']
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====Extra Information====
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:[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 ''Accuracy of results, page 274, GCSE Chemistry, Hodder, AQA'']
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{{#ev:youtube|https://www.youtube.com/watch?v=dO2xx-aeZ4w}}
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:[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 ''Accuracy, page 13, GCSE Physics, Hodder, AQA'']
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:[https://www.amazon.co.uk/gp/product/1471851338/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851338&linkCode=as2&tag=nrjc-21&linkId=425855d5890466e47189e1c21b67a1ea ''Accuracy, page 148, GCSE Biology, Hodder, AQA'']
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:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe09654 ''Accuracy, page 5, GCSE Combined Science; The Revision Guide, CGP, 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=f0dfb66dafcb0c6e9449e7b1a4ae1ac7 ''Accuracy, page 5, GCSE Physics; The Revision Guide, CGP, AQA'']
 +
:[https://www.amazon.co.uk/gp/product/1782945571/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945571&linkCode=as2&tag=nrjc-21&linkId=9e29fad914244909903e5e93f8a01d28 ''Accuracy, page 6, GCSE Chemistry; The Revision Guide, CGP, AQA'']
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:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Accuracy, pages 10, 204, GCSE Combined Science Trilogy 2, Hodder, 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 ''Accuracy, pages 104, 286, GCSE Chemistry; Student Book, Collins, AQA'']
 +
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Accuracy, pages 266-267, GCSE Chemistry; Third Edition, Oxford University Press, 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 ''Accuracy, pages 279-280, GCSE Physics; Third Edition, Oxford University Press, AQA'']
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:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Accurate results, page 11, GCSE Combined Science Trilogy; Physics, CGP, AQA'']
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:[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 ''Accurate results, page 12, GCSE Biology, CGP, AQA'']
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:[https://www.amazon.co.uk/gp/product/1782945962/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945962&linkCode=as2&tag=nrjc-21&linkId=476bb5c8d1dfb5c08ac81b6d4d1c98d8 ''Accurate results, page 12, GCSE Chemistry, CGP, AQA'']
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:[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 ''Accurate results, page 12, GCSE Combined Science Trilogy; Biology, CGP, AQA'']
 +
:[https://www.amazon.co.uk/gp/product/178294639X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294639X&linkCode=as2&tag=nrjc-21&linkId=51599bb45a2bfaf7c1b6a978b2ca2616 ''Accurate results, page 12, GCSE Combined Science Trilogy; Chemistry, CGP, AQA '']
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:[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 ''Accurate results, page 12, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA'']
  
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===Equilibrium of the Earth's Atmosphere===
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====Edexcel====
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: The amount of different [[gas]]es in the '''atmosphere''' have remained roughly the same for the last 3 million years due to a balance of processes which either add [[gas]]es to the '''atmosphere''' or remove it, including the [[Carbon Cycle|carbon cycle]] and the [[Nitrogen Cycle|nitrogen cycle (higher tier)]].
+
:[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 ''Accuracy, page 12, GCSE Chemistry, CGP, Edexcel  '']
−
: [[Carbon Dioxide]] is constantly produced by [[volcano]]es, [[combustion]] and [[respiration]], but it is removed from the [[atmosphere]] by [[photosynthesis]] and [[dissolve|dissolving]] in the [[ocean]].
+
:[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 ''Accuracy, page 5, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
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: [[Oxygen]] is constantly produced by [[photosynthesis]] but removed by [[combustion]] and [[respiration]].
+
:[https://www.amazon.co.uk/gp/product/1782946748/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946748&linkCode=as2&tag=nrjc-21&linkId=a4f0348fc37d0ba1bb52d27f8679581f ''Accuracy, page 6, GCSE Biology; The Revision Guide, CGP, Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1782945725/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945725&linkCode=as2&tag=nrjc-21&linkId=694be7494de75af3349537d34e13f7f0 ''Accuracy, page 6, GCSE Chemistry; The Revision Guide, CGP, 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 ''Accuracy, page 6, GCSE Physics; The Revision Guide, CGP, 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 ''Accuracy, pages 12, 15, GCSE Physics, CGP, Edexcel '']
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:[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 ''Accurate results, page 12, GCSE Biology, CGP, Edexcel '']
  
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===Human effects on the Atmosphere===
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====OCR====
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: The equilibrium of [[gas]]es has been affected by [[combustion]] and other industrial processes caused by [[human]]s.
 
−
: Before the industrial revolution the amount of [[Carbon Dioxide]] in the '''atmosphere''' was 0.02%. Since then, due to the [[combustion]] of [[Fossil Fuel|fossil fuels]] it has increased to 0.04% which [[scientist]]s believe is causing the [[Mean Average|average]] global [[temperature]] to increase.
 
  
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===References===
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:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Accuracy, page 5, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR  '']
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====AQA====
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:[https://www.amazon.co.uk/gp/product/1782945660/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945660&linkCode=as2&tag=nrjc-21&linkId=83aa4500ad7759e7f401a1c5ba5df758 ''Accuracy, page 6, Gateway GCSE Biology; The Revision Guide, CGP, OCR '']
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:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe09697 ''Atmosphere, page 155, GCSE Combined Science; The Revision Guide, CGP, AQA '']
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:[https://www.amazon.co.uk/gp/product/1782945679/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945679&linkCode=as2&tag=nrjc-21&linkId=a2db42f7b4bdf10cafaafa3bb9120940 ''Accuracy, page 6, GCSE Chemistry; The Revision Guide, CGP, OCR Gateway '']
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:[https://www.amazon.co.uk/gp/product/1782945571/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945571&linkCode=as2&tag=nrjc-21&linkId=9e29fad914244909903e5e93f8a01d46 ''Atmosphere, page 91, GCSE Chemistry; The Revision Guide, CGP, AQA '']
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:[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 ''Accuracy, pages 10, 11, 152, 166, Gateway GCSE Chemistry, Oxford, OCR '']
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:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Atmosphere, pages 166, GCSE Combined Science Trilogy 2, Hodder, AQA  '']
 
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:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere, pages 194-205, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
 
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:[https://www.amazon.co.uk/gp/product/178294639X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294639X&linkCode=as2&tag=nrjc-21&linkId=51599bb45a2bfaf7c1b6a978b2ca2616 ''Atmosphere, pages 206-213, GCSE Combined Science Trilogy; Chemistry, CGP, AQA '']
 
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:[https://www.amazon.co.uk/gp/product/1782945962/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945962&linkCode=as2&tag=nrjc-21&linkId=476bb5c8d1dfb5c08ac81b6d4d1c98d8 ''Atmosphere, pages 268-275, GCSE Chemistry, CGP, AQA '']
 
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:[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 ''Atmosphere, pages 292-3, GCSE Chemistry; Student Book, Collins, AQA '']
 
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:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; ammonia, page 197, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
 
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:[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 ''Atmosphere; carbon dioxide levels, pages 228-9, GCSE Chemistry, Hodder, AQA '']
 
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:[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 ''Atmosphere; carbon dioxide removal, pages 226-7, GCSE Chemistry, Hodder, AQA '']
 
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:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; carbon dioxide, pages 194-196, 198-201, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
 
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:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Atmosphere; Composition today, pages 167, GCSE Combined Science Trilogy 2, Hodder, AQA  '']
 
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:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; composition, page 197, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
 
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:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Atmosphere; Early composition, pages 167-8, GCSE Combined Science Trilogy 2, Hodder, AQA  '']
 
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:[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 ''Atmosphere; early composition, pages 224-5, GCSE Chemistry, Hodder, AQA '']
 
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:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; early Earth, page 194, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
 
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:[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 ''Atmosphere; early, pages 296-7, GCSE Chemistry; Student Book, Collins, AQA '']
 
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:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; evolution, pages 196-197, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
 
−
:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Atmosphere; Greenhouse gases, pages 170-3, GCSE Combined Science Trilogy 2, Hodder, AQA  '']
 
−
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; greenhouse gases, pages 198-201, GCSE Chemistry; Third Edition, Oxford University Press, 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 ''Atmosphere; Methane levels, pages 229-30, GCSE Chemistry, Hodder, AQA '']
 
−
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; methane, pages 194, 197, 198, 201, GCSE Chemistry; Third Edition, Oxford University Press, 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 ''Atmosphere; Origin of oxygen, pages 225-6, GCSE Chemistry, Hodder, AQA '']
 
−
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; oxygen, pages 194-195, 197, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
 
−
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; photosynthesis, pages 194-195, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
 
−
:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Atmosphere; Pollutants, pages 179-81, GCSE Combined Science Trilogy 2, Hodder, AQA  '']
 
−
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Atmosphere; pollutants, pages 202-203, GCSE Chemistry; Third Edition, Oxford University Press, 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 ''Atmosphere; Present composition, page 224, GCSE Chemistry, Hodder, AQA '']
 
−
:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Atmosphere; Removal of carbon dioxide, pages 169-70, GCSE Combined Science Trilogy 2, Hodder, AQA  '']
 
−
:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Atmosphere; Source of oxygen, pages 168-9, GCSE Combined Science Trilogy 2, 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 ''Atmosphere; Sources of pollution, pages 237-8, GCSE Chemistry, Hodder, 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 '']
 
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:[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 '']
 
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:[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 '']
 

Latest revision as of 10:08, 30 November 2019

Key Stage 4

Meaning

Results are accurate if they are close to the true value.

About Accuracy

Accuracy is achieved by:
If there are random errors and a small sample size taking repeat readings, removing anomalies and calculating an average can improve the accuracy.
If there are systematic errors or zero errors the results can be improved by finding the source of the error and correcting it.

Accuracy vs Precision

Experimental Measurements of pi
Method Test 1 Test 2 Test 3 Average Range
Method 1 3.27 3.09 3.01 3.12 0.26
Method 2 3.91 3.88 3.88 3.89 0.03
Method 3 3.57 2.89 2.93 3.13 0.68
The number pi is 3.14159265359 correct to 12 significant figures.

Method 1: The most accurate measurements because they are the closest to pi but they are not very precise because they have a range of 0.26.

Method 2: These are the least accurate measurements because they are the furthest from pi but they are very precise because they have a range of only 0.03.

Method 3: Each measurement is not accurate because they are far from pi, they are also the least precise because they have a range of 0.68. However, the average is the most accurate as it is the closes to pi.

References

AQA

Accuracy (of results), page 5, GCSE Biology; The Revision Guide, CGP, AQA
Accuracy of results, page 274, GCSE Chemistry, Hodder, AQA
Accuracy, page 13, GCSE Physics, Hodder, AQA
Accuracy, page 148, GCSE Biology, Hodder, AQA
Accuracy, page 5, GCSE Combined Science; The Revision Guide, CGP, AQA
Accuracy, page 5, GCSE Physics; The Revision Guide, CGP, AQA
Accuracy, page 6, GCSE Chemistry; The Revision Guide, CGP, AQA
Accuracy, pages 10, 204, GCSE Combined Science Trilogy 2, Hodder, AQA
Accuracy, pages 104, 286, GCSE Chemistry; Student Book, Collins, AQA
Accuracy, pages 266-267, GCSE Chemistry; Third Edition, Oxford University Press, AQA
Accuracy, pages 279-280, GCSE Physics; Third Edition, Oxford University Press, AQA
Accurate results, page 11, GCSE Combined Science Trilogy; Physics, CGP, AQA
Accurate results, page 12, GCSE Biology, CGP, AQA
Accurate results, page 12, GCSE Chemistry, CGP, AQA
Accurate results, page 12, GCSE Combined Science Trilogy; Biology, CGP, AQA
Accurate results, page 12, GCSE Combined Science Trilogy; Chemistry, CGP, AQA
Accurate results, page 12, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA

Edexcel

Accuracy, page 12, GCSE Chemistry, CGP, Edexcel
Accuracy, page 5, GCSE Combined Science; The Revision Guide, CGP, Edexcel
Accuracy, page 6, GCSE Biology; The Revision Guide, CGP, Edexcel
Accuracy, page 6, GCSE Chemistry; The Revision Guide, CGP, Edexcel
Accuracy, page 6, GCSE Physics; The Revision Guide, CGP, Edexcel
Accuracy, pages 12, 15, GCSE Physics, CGP, Edexcel
Accurate results, page 12, GCSE Biology, CGP, Edexcel

OCR

Accuracy, page 5, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR
Accuracy, page 6, Gateway GCSE Biology; The Revision Guide, CGP, OCR
Accuracy, page 6, GCSE Chemistry; The Revision Guide, CGP, OCR Gateway
Accuracy, pages 10, 11, 152, 166, Gateway GCSE Chemistry, Oxford, OCR
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