Homework 8
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| Metals are both good heat and electrical conductors due to | Looseness of outer electrons in metal atoms
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| A good heat conductor is a | Poor Insulator
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| Your toes feel warmer on a rug than on a tile floor because the rug | Is a better insulator than tile
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| If you were caught in freezing weather with only a candle for warmth, you would be warmer in | An igloo
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| A good insulator | Slows heat transfer
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| The process of convection occurs in | Fluids
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| If a volume of air is warmed, it expands. If a volume of air expands, it | Cools
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| Blow on your hand with your open mouth and you feel the warmth of your breath. Pucker your lips so your breath expands as you blow and your breath is | Cooler
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| Convection currents in the air near a seashore are produced by | Unequal heating of land and water
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| The average frequency of radiant energy is directly proportional to the | Kelvin temperature of the emitter
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| Objects that are good radiators generally | Absorb radiation relatively well
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| The higher the temperature of an object, the | Higher frequency it radiates
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| Which emits the highest frequency of radiation? | A blue-hot star
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| The higher the frequency of a wave, the | Shorter the wavelength
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| Cold water will warm to room temperature faster in a | Black Pot
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| An object will normally be a net radiator of energy when its temperature is | Higher than its surroundings
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| If air were a better conductor than it is, nighttimes on Earth would be | Noticeably cooler
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| A good absorber of radiation is a | Good emitter of radiation
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| A good reflector of radiation is a | Poor absorber of radiation
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| Suppose you want to save energy and you're going to leave your warm house for a half hour on a cold day. You should turn the thermostat | Off
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| The Sun's radiant energy is composed of shorter wavelengths than the Earth's because the Sun | Has a higher temperature than the Earth
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| Newton's law of cooling applies to objects that are | Warming and Cooling
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| A can of soft drink will cool faster if placed in what part of a refrigerator? | Freezer compartment
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| A red-hot piece of iron will cool faster in a | Cool room
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| If the greenhouse effect on Earth were absent, Earth's average temperature would be about | -18 degrees C
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| Glass and the atmosphere are largely transparent to | Visible Light
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| Glass in a florist's greenhouse blocks radiation of | Low frequency
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| The interior of a greenhouse emits long-wavelength radiation due to its | Temperature
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| The Earth loses heat mainly by | Radiation
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| When evaporation occurs in a dish of water, the molecules left behind in the water | Result in lowered temperature, are less energetic, and have decreased average speeds
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| Evaporation is a cooling process because | The more energetic molecules are able to escape the liquid.
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| Sublimation is a change of phase from solid to gas without | Going through the liquid phase
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| The dew that forms on a cold soda can when taken from a refrigerator is due to | Condensation
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| A hot dog pants | To help evaporation occur in its mouth and bronchial tract
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| Pigs wallow in mud mainly to | Cool themselves by evaporation
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| The process of boiling water tends to | Cool the water
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| Increased air pressure on the surface of hot water tends to | Prevent boiling
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| n the mountains, water boils at | A lower temperature than at sea level
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| When salt is introduced to water, the temperature at which freezing occurs is | Lowered
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| If you want to cook eggs by boiling them while in the mountains, then compared with cooking at sea level you should | Boil them for a longer period of time
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| Melting and freezing are | Opposite processes, changes of phase, and processes of molecular transfer.
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| Which would burn the most, 100 degrees of water or 100 degrees of steam? | Steam
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| When a gas is changed to a liquid phase, the gas | Releases energy
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| We are warmed by condensation because water molecules in the air striking our bodies | Transfer some of their kinetic energies to us
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Created by:
akozlowski