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Definitions. Radiation. Convection. Conduction. Miscellaneous. 100. 100. 100. 100. 100. 200. 200. 200. 200. 200. 300. 300. 300. 300. 300. 400. 400. 400. 400. 400. 500. 500. 500. 500. 500. - PowerPoint PPT PresentationTRANSCRIPT
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DefinitionsRadiation Convection Conduction Miscellaneous
A: A means of heat transfer by movement of the heated
substance itself, such as by currents in a fluid.
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Q: What is Convection?
A: A material that is a poor conductor of heat and that delays
the transfer of heat.200
Q: What is an insulator?
A: The transmission of energy by electromagnetic waves.
Q: What is radiation?
A: A material through which heat can flow, usually a metal.
Q: What is a conductor?
A: A means of heat transfer within certain materials and from one material to another when the
two are in direct contact.
Q: What is conduction?
A: This is the longest wave that can be seen, and it is around 500
degrees Celsius.
Q: What is red light?
A: At 1200 degrees Celsius, radiation gives off yellowish light, better known as this.
Q: What is “white hot”?
A: Radio waves, ultraviolet radiation, X rays, and gamma
rays are examples of these.
Q: What are electromagnetic waves?
A: Good absorbers are good emitters; poor absorbers are poor
emitters, as stated in this.
Q: What is the emission of radiant energy?
A: Reflection opposes this process.
Q: What is absorption?
A: Convection is an application of this principle, for all buoyed upward by denser surrounding
fluid.
Q: What is Archimedes’ principle?
A: As air over the shore rises, cooler air from above the water takes its place (creating this.)
Q: What is a sea breeze?
A: Convection currents stirring in the atmosphere.
Q: What are winds?
Q: If you blow on your hand, with your mouth open, your breath is warm. But if you
pucker your lips, your breath is cooler. Why?
A: Expanding air cools.
Q: Putting your fingers beside a flame is much safer than over top
of it. Why?
A: Heat travels upward by air convection. Little air travels
sideways.
A: Of the metals, silver then copper are top of the list of these.
Q: What are conductors?
A: Simply put: collisions between atoms or molecules and
the actions of loosely bound electrons.
Q: What is conduction?
A: Wood, wool, straw, paper, and cork are poor conductors, but are
top ______.
Q: What are insulators?
Q: A blanket does not truly give off heat. It slows the transfer of
______ ________ to your surroundings.
A: What is body heat?
Q: Why would snow last longer on a well-insulated roof?
A: Little heat escapes from the house, keeping heat unable to
escape and melt snow.
A: Radiation energy emitted from the earth after being absorbed
from the sun.
Q: What is terrestrial radiation?
A: Rate of cooling ~ Δ t
Q: What is Newton’s law of cooling?
A: The warming effect whose cause is that short-wavelength
radiant energy from the sun can enter the atmosphere and be
absorbed by the earth more easily than long-wavelength energy
from the earth can leave.
Q: What is the greenhouse effect?
Q: Our present environmental concern is that excess carbon dioxide and other atmospheric
gases will trap too much energy, causing this.
A: What is global warming?
Q: The radiant energy from the sun is composed of short waves and lets off three waves. What
three waves?
A: What are ultraviolet, visible light, and short-wavelength
waves?