Question 1

A hot dog pants

Accepted Answer

A)  to help evaporation occur in its mouth and bronchial tract.
B)  to bring more oxygen into its lungs.
C)  for no particular reason-some things just happen.
D)  to appear sexually appealing.

Question 2

Food is cooked faster in a pressure cooker due to its

Accepted Answer

A)  greater rate of bubble formation in the water.
B)  higher thermal energy.
C)  higher temperature.
D)  none of the above

Question 3

A red-hot piece of iron will cool slower in a

Accepted Answer

A)  cold room.
B)  warm room.
C)  same in each

Question 4

To save the most energy when you leave your cool house for an hour or so on a hot day,you should turn the temperature setting on the air conditioner

Accepted Answer

A)  down.
B)  up.
C)  off.
D)  to room temperature.

Question 5

Newton's law of cooling applies to things that are

Accepted Answer

A)  cooling.
B)  warming.
C)  both of these
D)  none of the above

Question 6

Which body continually emits electromagnetic waves?

Accepted Answer

A)  the Sun
B)  the Earth
C)  you and your classmates
D)  all of the above
E)  none of the above

Question 7

Pigs wallow in mud mainly to

Accepted Answer

A)  decrease thermal conductivity.
B)  shield themselves from the Sun.
C)  cool themselves by evaporation.

Question 8

We are warmed on a hot moist day because water molecules in the air striking our bodies

Accepted Answer

A)  transfer some of their kinetic energies to us.
B)  gain kinetic energy as they change state.
C)  form an insulating layer on our bodies.

Question 9

A good reflector of radiation is a

Accepted Answer

A)  good absorber of radiation.
B)  good emitter of radiation.
C)  poor absorber of radiation.
D)  none of the above

Question 10

Which requires more energy?

Accepted Answer

A)  melting a gram of 0°C ice
B)  increasing the temperature of 1 gram of water from 0°C to 100°C
C)  changing 1 gram of 100°C water to 100°C steam
D)  all the same

Question 11

The silver lining on the glass surfaces of a Thermos bottle reduces energy that is transferred by

Accepted Answer

A)  conduction.
B)  convection.
C)  radiation.
D)  friction.
E)  none of the above

Question 12

In a gaseous mixture of hydrogen and oxygen,the molecules most contributing to temperature are

Accepted Answer

A)  hydrogen.
B)  oxygen.
C)  both the same
D)  not enough information

Question 13

Human activities that warm the Earth's atmosphere are caused by energy

Accepted Answer

A)  production.
B)  consumption.
C)  both of these
D)  none of the above

Question 14

As water changes to ice,water molecules

Accepted Answer

A)  absorb energy.
B)  release energy.
C)  retain their energy.
D)  lose the quality of wetness.

Question 15

If a pizza absorbs more energy than it emits,its temperature

Accepted Answer

A)  decreases.
B)  is unaffected.
C)  increases.
D)  none of the above

Question 16

Coffee is served at a restaurant before you are ready to drink it.To be hottest when you are ready to drink it,you should add cream

Accepted Answer

A)  right away.
B)  at any time.
C)  when you are ready to drink the coffee.

Question 17

The higher the temperature of an object,the

Accepted Answer

A)  longer the wavelengths it radiates.
B)  shorter the wavelengths it radiates.
C)  none of the above

Question 18

In terms of transferring heat,red-hot wooden coals

Accepted Answer

A)  conduct quite well.
B)  conduct poorly.
C)  radiate poorly.
D)  convect poorly.

Question 19

When a gas changes phase to become a solid,energy is

Accepted Answer

A)  absorbed.
B)  released.
C)  unchanged.

Question 20

Convection currents in the air near a seashore are produced by

Accepted Answer

A)  shifting winds.
B)  unequal heating of land and water.
C)  varying temperatures.
D)  none of the above

Exam 7: Heat Transfer and Change of Phase

The silver lining on the glass surfaces of a Thermos bottle reduces energy that is transferred by

Correct AnswerverifiedShow Answer

We are warmed on a hot moist day because water molecules in the air striking our bodies

Correct AnswerverifiedShow Answer

To save the most energy when you leave your cool house for an hour or so on a hot day,you should turn the temperature setting on the air conditioner

Correct AnswerverifiedShow Answer

Newton's law of cooling applies to things that are

Correct AnswerverifiedShow Answer

Coffee is served at a restaurant before you are ready to drink it.To be hottest when you are ready to drink it,you should add cream

Correct AnswerverifiedShow Answer

Pigs wallow in mud mainly to

Correct AnswerverifiedShow Answer

A hot dog pants

Correct AnswerverifiedShow Answer

Human activities that warm the Earth's atmosphere are caused by energy

Correct AnswerverifiedShow Answer

Food is cooked faster in a pressure cooker due to its

Correct AnswerverifiedShow Answer

When a gas changes phase to become a solid,energy is

Correct AnswerverifiedShow Answer

As water changes to ice,water molecules

Correct AnswerverifiedShow Answer

In a gaseous mixture of hydrogen and oxygen,the molecules most contributing to temperature are

Correct AnswerverifiedShow Answer

Which body continually emits electromagnetic waves?

Correct AnswerverifiedShow Answer

Convection currents in the air near a seashore are produced by

Correct AnswerverifiedShow Answer

If a pizza absorbs more energy than it emits,its temperature

Correct AnswerverifiedShow Answer

The higher the temperature of an object,the

Correct AnswerverifiedShow Answer

In terms of transferring heat,red-hot wooden coals

Correct AnswerverifiedShow Answer

A good reflector of radiation is a

Correct AnswerverifiedShow Answer

A red-hot piece of iron will cool slower in a

Correct AnswerverifiedShow Answer

Which requires more energy?

Correct AnswerverifiedShow Answer

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