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[[File:Thermometer.png|right|300px|thumb|A '''thermometer measuring ''' showing the [[temperature ]] of some the snow outsidewas -10°C.]]A '''thermometer''' is a [[Scientific Instrument|scientific instrument piece of equipment used to [[measure]] the [[temperature ]] of an object.

: Most thermometers have a range of '''[[Temperature|temperatures''' ]] they can measure and some [[Temperature|temperatures ]] they can't. If you put a [[glass]] '''thermometer''' in a fire it will [[Melting|melt]].: A '''thermometer''' can show a negative [[temperature]] because the Celsius scale was chosen to have water freezing as 0 degrees Celsius. So anything colder than freezing water is given a negative [[temperature]].

: A [[Doctor]] [[Measure|measured]] the [[temperature]] of their patient.

: The [[temperature]] of the [[Doctor|doctor's]] patient was found using a '''thermometer'''.: The [[Scientist|scientist's]] '''thermometer''' showed the [[temperature]] in the [[laboratory]] was 2320°C. ==Key Stage 3=====Meaning===A [[thermometer]] is a [[Measuring Instrument|measuring instrument]] used to [[measure]] the [[temperature]] of an [[object]]. ===About Thermometers===: [[Thermometer]] usually give the [[temperature]] in [[Degrees Celsius|degrees Celsius]] (°C).: [[Thermometer]]s are usually made of [[glass]] so caution must be taken when using them so that they do not break.: Most thermometers have a range of [[temperature]]s they can [[measure]] and some [[temperature]]s they can't. If a [[glass]] [[thermometer]] is placed in a fire it will [[Melting|melt]], so the [[temperature]] of the fire is beyond its range.: A '''thermometer''' can show a negative [[temperature]] because the [[Degrees Celsius|Celsius]] scale was chosen to have [[water]] [[freezing]] as 0 [[Degrees Celsius|degrees Celsius]]. So anything colder than [[freezing]] [[water]] is given a negative [[temperature]]. ==Key Stage 4=====Meaning===A [[thermometer]] is a [[Measuring Instrument|measuring instrument]] used to [[measure]] the [[temperature]] of an [[object]]. ===About Thermometers===: [[Thermometer]]s are usually made of [[glass]] so caution must be taken when using them so that they do not break.: Most thermometers have a [[range]] of [[temperature]]s they can [[measure]] and some [[temperature]]s they can't so the correct [[range]] should be chosen for the [[experiment]].: A '''thermometer''' can show a negative [[temperature]] because the [[Degrees Celsius|Celsius]] scale was chosen to have [[water]] [[freezing]] as 0 [[Degrees Celsius|degrees Celsius]]. So anything colder than [[freezing]] [[water]] is given a negative [[temperature]].: The [[resolution]] of a [[thermometer]] may be 1°C or 0.1°C given a small space between the markings or 0.5°C or 0.05°C if those markings are spaced far apart and it can be clearly seen when the [[temperature]] is half way between markings.: To use a [[thermometer]] [[accurate]]ly::*It must not have any bubbles in the [[liquid]] inside. To remove the bubbles the [[thermometer]] may be shaken carefully to more the bubbles without breaking the [[thermometer]].:*It must be [[calibrate]]d by placing it in a known [[temperature]] and checking it [[reading|reads]] the correct value for example the [[Melting Point|melting point]] or [[Boiling Point|boiling point]] of [[water]]. ===References=======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 ''Thermometers, accuracy and precision of, pages 10, GCSE Combined Science Trilogy 2, 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 ''Thermometers, page 126, GCSE Biology; 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=9e29fad914244909903e5e93f8a01d259 ''Thermometers, page 18, 108, GCSE Chemistry; The Revision Guide, CGP, 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=ad276ad49df77ab4b40ab4fd0fe10357 ''Thermometers, page 233, GCSE Combined Science; The Revision Guide, 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 ''Thermometers, pages 41, 237, GCSE Combined Science Trilogy; Chemistry, 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 ''Thermometers, pages 41, 315, GCSE Chemistry, CGP, AQA ''] ====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 ''Thermometers, page 110, GCSE Chemistry; The Revision Guide, CGP, Edexcel '']:[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 ''Thermometers, page 209, GCSE Combined Science; The Revision Guide, 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 ''Thermometers, page 323, GCSE Chemistry, CGP, Edexcel ''] ====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 ''Thermometers, page 103, Gateway GCSE Chemistry; The Revision Guide, CGP, 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 ''Thermometers, page 219, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']