Difference between revisions of "Heating"
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==Key Stage 3== | ==Key Stage 3== | ||
===Meaning=== | ===Meaning=== | ||
| − | ''' | + | '''Heat''' means to [[Energy Transfer|transfer energy]] from one [[Energy Store]] into another through [[Thermal Conduction|Conduction]], [[Convection]] or [[Thermal Radiation]]. |
===About Heating=== | ===About Heating=== | ||
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*[[Convection]] - [[Fluid]] at high [[temperature]] is less [[Density|dense]] than [[fluid]] at low [[temperature]] so the high [[temperature]] [[fluid]] rises and the low [[temperature]] [[fluid]] sinks. | *[[Convection]] - [[Fluid]] at high [[temperature]] is less [[Density|dense]] than [[fluid]] at low [[temperature]] so the high [[temperature]] [[fluid]] rises and the low [[temperature]] [[fluid]] sinks. | ||
*[[Thermal Radiation]] - Objects can [[emit]] and [[Absorb (Physics)|absorb]] [[Thermal Radiation]]. The higher the [[temperature]] the more [[Thermal Radiation]] they [[emit]]. | *[[Thermal Radiation]] - Objects can [[emit]] and [[Absorb (Physics)|absorb]] [[Thermal Radiation]]. The higher the [[temperature]] the more [[Thermal Radiation]] they [[emit]]. | ||
| + | |||
| + | ===Common Misconceptions=== | ||
| + | : '''Heat''' is often misused as a noun and in colloquial terms often used in place of the term [[Thermal Energy]]. | ||
| + | : '''Heat''' rises is an inaccurate statement referencing [[convection]] wherein a [[fluid]], warmer than the surrounding [[fluid]] will rise due it having a lower [[density]] than its surroundings. | ||
==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| − | ''' | + | '''Heat''' means to [[Energy Transfer|transfer energy]] from one [[system]] into another due to the [[temperature]] difference between those two [[system]]s. |
===About Heating=== | ===About Heating=== | ||
Revision as of 17:52, 3 July 2023
Contents
Key Stage 3
Meaning
Heat means to transfer energy from one Energy Store into another through Conduction, Convection or Thermal Radiation.
About Heating
- Heating happens when two objects of different temperature are in contact with one another.
- Energy is transferred from the hotter to the cooler object until they reach 'Thermal Equilibrium' which means they are both at the same temperature.
- Heating transfers energy from the Thermal Energy Store of one object to the Thermal Energy Store of another object.
There are three ways that heating can occur:
- Thermal Conduction - Vibrating particles collide with other particles passing on their energy.
- Convection - Fluid at high temperature is less dense than fluid at low temperature so the high temperature fluid rises and the low temperature fluid sinks.
- Thermal Radiation - Objects can emit and absorb Thermal Radiation. The higher the temperature the more Thermal Radiation they emit.
Common Misconceptions
- Heat is often misused as a noun and in colloquial terms often used in place of the term Thermal Energy.
- Heat rises is an inaccurate statement referencing convection wherein a fluid, warmer than the surrounding fluid will rise due it having a lower density than its surroundings.
Key Stage 4
Meaning
Heat means to transfer energy from one system into another due to the temperature difference between those two systems.
About Heating
- Heating happens when two objects of different temperature are in contact with one another.
- Energy is transferred from the hotter to the cooler object until they reach 'Thermal Equilibrium' which means they are both at the same temperature.
- Heating transfers energy from the thermal energy store of one object to the thermal energy store or the internal energy store of another object.
- When heating increases the thermal energy store of an object the temperature will increase.
- When heating increases the internal energy of an object this may increase its temperature or it may cause it to change state, eg Melting or Boiling.
There are three ways that heating can occur:
- Thermal Conduction - Vibrating particles collide with other particles passing on their energy.
- Convection - Fluid at high temperature is less dense than fluid at low temperature so the high temperature fluid rises and the low temperature fluid sinks.
- Thermal Radiation - Objects can emit and absorb Thermal Radiation. The higher the temperature the more Thermal Radiation they emit.
References
AQA
- Heating substances, page 110, GCSE Chemistry; The Revision Guide, CGP, AQA
- Heating substances, pages 239, 240 GCSE Combined Science Trilogy; Chemistry, CGP, AQA
- Heating substances, pages 290, 291, GCSE Combined Science Trilogy; Biology, CGP, AQA
- Heating substances, pages 317, 318, GCSE Chemistry, CGP, AQA
- Heating substances, pages 370, 371, GCSE Biology, CGP, AQA
- Heating, page 324, GCSE Combined Science Trilogy 1, Hodder, AQA
- Heating, page 37, GCSE Chemistry; Third Edition, Oxford University Press, AQA
- Heating, page 72, GCSE Physics, Hodder, AQA
- Heating, pages 11, 13, 39, GCSE Physics; The Revision Guide, CGP, AQA
- Heating, pages 170, 171, 195, 196, 238, GCSE Combined Science; The Revision Guide, CGP, AQA
- Heating, pages 21, 29-31, 34, 35, 100, 101, 103, GCSE Combined Science Trilogy; Physics, CGP, AQA
- Heating, pages 22, 30-32, 35, 36, 110, 111, 113, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA