Heat (grade 8)
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Transcript of Heat (grade 8)
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“HEAT”
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• Heat is a form of energy that flows from warmer bodies to colder bodies.
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• It is viewed as a form of energy that is transferred from one body to another due to a difference in temperature.
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• The SI unit of heat is joule (J).
• Common unit of heat is calorie.
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• CALORIE the amount of heat needed to change the temperature of one gram of water from the pressure of the atmosphere.
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TEMPERATURE
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LAYMAN’S TERM- It is the degree of hotness or coldness of an object.
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Molecular level- A measure of the average kinetic energy of these molecules.
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Based from our sensory experiences:
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“Can we use our senses to determine temperature?”
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THERMOMETER- a device that
measures temperature
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The most common type of the thermometer.
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THERMOCOUPLE-two different metals (usually copper and iron) that are twisted together
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INFRARED THERMOGRAMS-a device (camera) that measures the amount of radiant energy given off by an object
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TEMPERATURE SCALES
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TEMPERATURE SCALES
CELSIUS(Andres Celsius)
FAHRENHEIT (Daniel Gabriel
Fahrenheit)
KELVIN (William
Thompson / Lord Kelvin)
RANKINE (William Rankine)
°C = 5/9 ( °F – 32)
°F = 9/5 ( °C + 32)
K = °C + 273 °R = °F + 459.67°