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THERMAL ENERGY Section 2 Review Pg. 150, 11-15
Terms in this set (5)
11Q. Identify which method of thermal energy transfer would be fastest through a vacuum, which would be fastest through a gas, and which would be fastest through a solid.
11A.vacuum- Radiation, Gas- Convection- solid- Conduction
12Q. Explain why the air temperature near the ceiling of a room tends to be warmer than the air temperature near the floor.
12A. Because warmer hair is less dense so it makes it rise while cool hair is more dense so it makes it go downward.
13Q. Predict whether plastic foam, which contains pockets of air, would be a good thermal conductor or a good thermal insulator.
13A. It would be a good thermal insulator because of the pockets of air that trap the air so it doesn't easily transfer to the cooler air.
14Q. Think Critically- Several days after a snowball, the roofs of some homes on a street have almost no snow on them, while the roofs of other homes are still snow-covered. Give one reason, related to home insulation, that might cause this difference.
14A. This is because of the homes insulation that makes the energy transfer slowly so if it is well insulated the snow will stay on your roof but if it is not insulated well then the heat will travel upwards to the roof and melt the snow.
15Q. Calculate Solar Radiation: Averaged over a year in the central United States, radiation from the Sun transfers about 200 W to each square meter of Earth's surface. If a house is 10 m long by 10 m wide, how much solar energy falls on the house each second.
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