Difference between revisions of "Control Variable"
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|'''Controls''' | |'''Controls''' | ||
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| − | |[[File:RaceChildren.png|center| | + | |[[File:RaceChildren.png|center|300px]] |
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*Everyone starts from the same starting line. | *Everyone starts from the same starting line. | ||
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| + | {| class="wikitable" | ||
| + | |+This experiment would not be a [[Fair Test|fair test]] if variables were not controlled. | ||
| + | |'''Experiment: Does light affect cress growth?''' | ||
| + | |'''Controls''' | ||
| + | |- | ||
| + | |[[File:Cress.png|center|300px]] | ||
| + | | | ||
| + | *All cress gets the same amount of water. | ||
| + | *All cress is kept at the same temperature. | ||
| + | *All cress has the same amount of soil. | ||
| + | |} | ||
If you want to know how plants grow differently depending on the light, you should make sure they are all watered the same, have the same soil and are kept at the same temperature. | If you want to know how plants grow differently depending on the light, you should make sure they are all watered the same, have the same soil and are kept at the same temperature. | ||
| + | |||
| + | ==Key Stage 3== | ||
| + | ===Meaning=== | ||
| + | [[Control Variable]]s are all the conditions of an [[experiment]]t that are kept the same. | ||
| + | |||
| + | ===About Control Variables=== | ||
| + | : Changing more than one [[variable]] in an [[experiment]] makes it impossible to tell which [[variable]] caused the [[result]]s. | ||
| + | : [[Control Variable]]s ensure that only the [[Independent Variable]] could be responsible for a change in the [[Dependent Variable]]. | ||
| + | : [[Control Variable]]s make sure an [[experiment]] is a [[Fair Test|fair test]]. | ||
| + | |||
| + | ==Key Stage 4== | ||
| + | ===Meaning=== | ||
| + | [[Control Variable]]s are all the conditions of an [[experiment]]t that are kept the same. | ||
| + | |||
| + | ===About Control Variables=== | ||
| + | : Changing more than one [[variable]] in an [[experiment]] makes it impossible to tell which [[variable]] caused the [[result]]s. | ||
| + | : [[Control Variable]]s ensure that only the [[Independent Variable]] could be responsible for a change in the [[Dependent Variable]]. | ||
| + | : [[Control Variable]]s make sure an [[experiment]] a [[Fair Test|fair test]] and that the [[results]] are [[valid]]. | ||
| + | |||
| + | ===References=== | ||
| + | ====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 ''Control variables, page 10, GCSE Biology, CGP, AQA ''] | ||
| + | :[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 ''Control variables, page 10, GCSE Chemistry, 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 ''Control variables, page 10, 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 ''Control variables, page 10, GCSE Combined Science Trilogy; Chemistry, 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 ''Control variables, page 144, GCSE Chemistry, Hodder, 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 ''Control variables, page 241, GCSE Combined Science Trilogy 1, Hodder, AQA ''] | ||
| + | :[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=ad276ad49df77ab4b40ab4fd0fe09806 ''Control variables, page 4, 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=f0dfb66dafcb0c6e9449e7b1a4ae1ac69 ''Control variables, page 4, 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=9e29fad914244909903e5e93f8a01d92 ''Control variables, page 5, GCSE Chemistry; The Revision Guide, CGP, 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 ''Control variables, pages 17, 178, GCSE Physics, 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 ''Control variables, pages 253, GCSE Combined Science Trilogy 2, Hodder, AQA ''] | ||
| + | |||
| + | ====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 ''Control variables, page 10, GCSE Biology, CGP, 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 ''Control variables, page 10, GCSE Chemistry, 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 ''Control variables, page 10, GCSE Physics, CGP, Edexcel ''] | ||
| + | :[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 ''Control variables, page 5, 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 ''Control variables, page 5, 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 ''Control variables, page 5, GCSE Physics; The Revision Guide, CGP, Edexcel ''] | ||
| + | |||
| + | ====OCR==== | ||
| + | :[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 ''Control variables, page 4, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR ''] | ||
| + | :[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 ''Control variables, page 5, Gateway GCSE Biology; The Revision Guide, CGP, OCR ''] | ||
| + | :[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 ''Control variables, page 5, GCSE Chemistry; The Revision Guide, CGP, OCR Gateway ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/0198359810/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359810&linkCode=as2&tag=nrjc-21&linkId=d768d99f1a06f7c12fab40e5aef85a55 ''Control variables, page 8 , Gateway GCSE Biology, 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 ''Control variables, pages 8, Gateway GCSE Physics, Oxford, OCR ''] | ||
Latest revision as of 15:11, 3 December 2019
Contents
Key Stage 2
Meaning
A control variable is something which is kept the same in an experiment to make it a fair test.
About Control Variables
- Changing more than one thing in an experiment can affect the results.
- If you do not have control variables it is not a fair test.
Examples
| Investigation: Who is the fastest? | Controls |
 |
|
| Experiment: Does light affect cress growth? | Controls |
 |
|
If you want to know how plants grow differently depending on the light, you should make sure they are all watered the same, have the same soil and are kept at the same temperature.
Key Stage 3
Meaning
Control Variables are all the conditions of an experimentt that are kept the same.
About Control Variables
- Changing more than one variable in an experiment makes it impossible to tell which variable caused the results.
- Control Variables ensure that only the Independent Variable could be responsible for a change in the Dependent Variable.
- Control Variables make sure an experiment is a fair test.
Key Stage 4
Meaning
Control Variables are all the conditions of an experimentt that are kept the same.
About Control Variables
- Changing more than one variable in an experiment makes it impossible to tell which variable caused the results.
- Control Variables ensure that only the Independent Variable could be responsible for a change in the Dependent Variable.
- Control Variables make sure an experiment a fair test and that the results are valid.
References
AQA
- Control variables, page 10, GCSE Biology, CGP, AQA
- Control variables, page 10, GCSE Chemistry, CGP, AQA
- Control variables, page 10, GCSE Combined Science Trilogy; Biology, CGP, AQA
- Control variables, page 10, GCSE Combined Science Trilogy; Chemistry, CGP, AQA
- Control variables, page 144, GCSE Chemistry, Hodder, AQA
- Control variables, page 241, GCSE Combined Science Trilogy 1, Hodder, AQA
- Control variables, page 4, GCSE Combined Science; The Revision Guide, CGP, AQA
- Control variables, page 4, GCSE Physics; The Revision Guide, CGP, AQA
- Control variables, page 5, GCSE Chemistry; The Revision Guide, CGP, AQA
- Control variables, pages 17, 178, GCSE Physics, Hodder, AQA
- Control variables, pages 253, GCSE Combined Science Trilogy 2, Hodder, AQA
Edexcel
- Control variables, page 10, GCSE Biology, CGP, Edexcel
- Control variables, page 10, GCSE Chemistry, CGP, Edexcel
- Control variables, page 10, GCSE Physics, CGP, Edexcel
- Control variables, page 5, GCSE Biology; The Revision Guide, CGP, Edexcel
- Control variables, page 5, GCSE Chemistry; The Revision Guide, CGP, Edexcel
- Control variables, page 5, GCSE Physics; The Revision Guide, CGP, Edexcel
OCR
- Control variables, page 4, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR
- Control variables, page 5, Gateway GCSE Biology; The Revision Guide, CGP, OCR
- Control variables, page 5, GCSE Chemistry; The Revision Guide, CGP, OCR Gateway
- Control variables, page 8 , Gateway GCSE Biology, Oxford, OCR
- Control variables, pages 8, Gateway GCSE Physics, Oxford, OCR