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14 Cards in this Set
- Front
- Back
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What is heat?
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A form of energy possessed by matter as a result of the agitation or motion of molecules
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What is temperature?
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A scale for measurement of heat energy.
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How do you calculate for Celsius?
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C = 5/9 (F - 32)
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How do you calculate for Fahrenheit?
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9/5 C + 32
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How do you calculate for Kelvin?
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K = 273 + C
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What is conduction?
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Direct contact w/ source. Agitating molecules give up energy to slower molecules until food is heated throughout.
- slowest method of heat transfer |
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What is convection?
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The transfer by currents in flowing matter (liquids and gases)
- faster than conduction - heated material becomes less dense and rises |
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What is radiation?
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transfer of heat by emission of waves
- will only heat surface, then heat penetrates food though conduction or convection. - faster heating than convection |
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What are the parts of the microwave?
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Magnetron
Wave Guide Stirrer Glass Plate |
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What happens when metals are placed into a microwave?
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Microwave energy is reflected from metals. Metals do not heat.
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What absorbs microwaves?
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Foods rank high as microwaves absorbers.
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How does the process of browning occur in a microwave?
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A caramel color-containing emuulsion on the surface of the food product breaks at 140 degrees F to release the color.
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What are the advatages to microwaves?
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1. penetration - faster thawing and cooking
2. less nutrient loss 3. less energy costs |
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What are the disadvantages of microwaves?
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1. no browning
2. safety issues (metals, pacemakers) 3. cold spots |
