Energy 7
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Transcript of Energy 7
![Page 1: Energy 7](https://reader038.fdocuments.net/reader038/viewer/2022102608/556228d9d8b42ad44d8b53ab/html5/thumbnails/1.jpg)
Radiation
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Convection This is the transfer of _________ energy through the
movement of ______________ themselves. ____________ moves from ______________ areas to cooler areas.
Liquids and ____________ can transfer heat by
______________ because the _______________ can move around unlike the particles in a solid.
particles heat gases particles energy hotter
convection
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RadiationHeat can move by travelling as Infra Red waves
These are electromagnetic waves, like light waves, but with a longer wavelength
An example is the sun:
The sun emits energy through electromagnetic waves
These come in contact with your skin
You can feel your skin getting warmer as energy is absorbed.
![Page 4: Energy 7](https://reader038.fdocuments.net/reader038/viewer/2022102608/556228d9d8b42ad44d8b53ab/html5/thumbnails/4.jpg)
RadiationElectromagnetic waves act very much like
light waves:
They can travel through a vacuumThey travel at 300,000,000 m/sThey can be reflectedThey can’t travel through opaque materials.
![Page 5: Energy 7](https://reader038.fdocuments.net/reader038/viewer/2022102608/556228d9d8b42ad44d8b53ab/html5/thumbnails/5.jpg)
RadiationWhen infra- red radiation falls on an object,
some will be reflected and some will be absorbed.
An object with a shiny or light surfacewill be a good reflector of infra-red radiation.
An object with a dark surface will be a good absorber of infra-red radiation.
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Radiation
Which outfit would be best for a match played during the day when the weather is hot and sunny? Why?
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Which would be the best cup for keeping your tea warm? Why?
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Why are houses in Andalucia usually painted white?
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Why are fuel storage tanks like these usually silver/white in colour?
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SummaryDescribe what is going on and how each
method of heat transfer works in this example:
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Radiation This is the transfer of heat energy by __________.
Radiated heat can travel through a ____________, an empty space with no particles in it.
This is why an ice cream will melt in the sun. vacuum waves.