Question 1

The cooling effect inside a refrigerator is produced by

Accepted Answer

A)  an electric motor that converts electrical energy to internal energy.
B)  compressing the refrigeration gas.
C)  vaporizing the refrigeration liquid.
D)  proper insulation.
E)  exchanging warmer air with colder air.F) B) and D)
G) A) and B)

Question 2

Stored potatoes, beets, and rutabagas freeze at temperatures below zero degrees Celsius (rather than at exactly zero) because

Accepted Answer

A)  they are good radiators of energy.
B)  they are good absorbers of radiant energy.
C)  the water in them contains dissolved salts and sugars.
D)  they are relatively dense.
E)  all of the aboveF) A) and B)
G) A) and C)

Question 3

Double-pane windows contain nitrogen rather than air to prevent

Accepted Answer

A)  gas escape.
B)  thermal conduction.
C)  condensation.
D)  heat flow.E) B) and D)
F) A) and D)

Question 4

In a heat pump, warming is accomplished when

Accepted Answer

A)  condensation occurs in its coils.
B)  vaporization occurs in its coils.
C)  both of these
D)  neither of theseE) C) and D)
F) A) and B)

Question 5

We feel uncomfortably warm on a muggy day because water molecules are

Accepted Answer

A)  evaporating from our moist bodies.
B)  condensing on our bodies.
C)  evaporating and condensing on our bodies at the same rate.
D)  none of the aboveE) C) and D)
F) B) and C)

Question 6

When water vapor condenses on the inside of a window, the room becomes slightly

Accepted Answer

A)  warmer.
B)  cooler.
C)  both of these
D)  neither of theseE) B) and C)
F) A) and B)

Question 7

The reason that evaporation is a cooling process is

Accepted Answer

A)  radiation of heat during the process.
B)  due to conduction and convection.
C)  the more energetic molecules escape the liquid.
D)  all of the above
E)  none of the aboveF) D) and E)
G) None of the above

Question 8

Which will melt more ice when placed on its surface, a kilogram of wood or a kilogram of iron of the same high temperature?

Accepted Answer

A)  1 kg of wood.
B)  1 kg of iron.
C)  both the same
D)  neither of theseE) A) and B)
F) None of the above

Question 9

An inventor discovers a harmless and tasteless salt, which when added to water changes its boiling point. The market value for this salt will be better if the salt

Accepted Answer

A)  lowers the boiling point of water.
B)  raises the boiling point of water.
C)  either raises or lowers the boiling point, as the food would be cooked either way.
D)  none of the aboveE) A) and D)
F) A) and C)

Question 10

The pressure at the bottom of a geyser is

Accepted Answer

A)  less than nearer the top.
B)  the same as nearer the top
C)  greater than nearer the top.
D)  all of the above
E)  none of the aboveF) All of the above
G) A) and C)

Question 11

When a gas is changed to a liquid, the gas

Accepted Answer

A)  releases energy.
B)  absorbs energy.
C)  both of these
D)  neither of theseE) A) and D)
F) All of the above

Question 12

When a solid is changed to a liquid, the solid

Accepted Answer

A)  releases energy.
B)  absorbs energy.
C)  both of these
D)  neither of theseE) A) and B)
F) A) and C)

Question 13

For increased atmospheric pressure, the boiling point of water

Accepted Answer

A)  goes down.
B)  rises.
C)  remains at 100 degrees C.D) None of the above
E) A) and B)

Question 14

When condensation occurs inside your bedroom window, the air outside is appreciably

Accepted Answer

A)  colder.
B)  warmer.
C)  both of these
D)  neither of theseE) All of the above
F) None of the above

Question 15

When liquids change to a solids, they

Accepted Answer

A)  absorb energy.
B)  release energy.
C)  both of these
D)  neither of theseE) A) and B)
F) A) and D)

Question 16

When a solid melts, energy is

Accepted Answer

A)  absorbed by the solid.
B)  released by the solid.
C)  both of these
D)  neither of theseE) C) and D)
F) A) and B)

Question 17

Dean teaches that the phenomenon of regelation is due to the

Accepted Answer

A)  freezing point of water.
B)  melting point of ice.
C)  open-structured nature of ice crystals.
D)  high specific heat of water.E) A) and B)
F) B) and C)

Question 18

A geyser such as Old Faithful in Yellowstone Park is similar to a

Accepted Answer

A)  vacuum bottle.
B)  canteen.
C)  coffee percolator.
D)  teakettle.
E)  vat of molten lead.F) A) and D)
G) C) and E)

Question 19

On a muggy day, water molecules in the air that strike our bodies

Accepted Answer

A)  transfer some of their kinetic energy to us.
B)  gain kinetic energy as they change phase.
C)  form an insulating layer on our bodies.D) B) and C)
E) All of the above

Question 20

Evaporation is a cooling process and condensation is

Accepted Answer

A)  a warming process.
B)  a cooling process also.
C)  neither of theseD) B) and C)
E) A) and C)

Exam 17: Change of Phase

When a solid melts, energy is

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When water vapor condenses on the inside of a window, the room becomes slightly

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In a heat pump, warming is accomplished when

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Evaporation is a cooling process and condensation is

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The pressure at the bottom of a geyser is

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For increased atmospheric pressure, the boiling point of water

Correct AnswerverifiedShow Answer

The reason that evaporation is a cooling process is

Correct AnswerverifiedShow Answer

An inventor discovers a harmless and tasteless salt, which when added to water changes its boiling point. The market value for this salt will be better if the salt

Correct AnswerverifiedShow Answer

Double-pane windows contain nitrogen rather than air to prevent

Correct AnswerverifiedShow Answer

We feel uncomfortably warm on a muggy day because water molecules are

Correct AnswerverifiedShow Answer

When condensation occurs inside your bedroom window, the air outside is appreciably

Correct AnswerverifiedShow Answer

A geyser such as Old Faithful in Yellowstone Park is similar to a

Correct AnswerverifiedShow Answer

The cooling effect inside a refrigerator is produced by

Correct AnswerverifiedShow Answer

When a solid is changed to a liquid, the solid

Correct AnswerverifiedShow Answer

Stored potatoes, beets, and rutabagas freeze at temperatures below zero degrees Celsius (rather than at exactly zero) because

Correct AnswerverifiedShow Answer

On a muggy day, water molecules in the air that strike our bodies

Correct AnswerverifiedShow Answer

Which will melt more ice when placed on its surface, a kilogram of wood or a kilogram of iron of the same high temperature?

Correct AnswerverifiedShow Answer

Dean teaches that the phenomenon of regelation is due to the

Correct AnswerverifiedShow Answer

When liquids change to a solids, they

Correct AnswerverifiedShow Answer

When a gas is changed to a liquid, the gas

Correct AnswerverifiedShow Answer

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