Question 1

When you walk barefoot on red-hot wooden coals it is best if

Accepted Answer

A) no pieces of metal are among the coals. 
B) you walk slowly to demonstrate your courage. 
C) you impress your friends by carrying away bits of wood between your toes. 
D) all of the above 
E) none of the above 
A) no pieces of metal are among the coals. 
B) you walk slowly to demonstrate your courage. 
C) you impress your friends by carrying away bits of wood between your toes. 
D) all of the above 
E) none of the above A

Question 2

A canteen that is wet on the outside results in water inside that is

Accepted Answer

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

Question 3

When fast-moving water molecules collide they tend to

Accepted Answer

A) rebound without sticking. 
B) stick. 
C) both of these 
D) neither of these 
A) rebound without sticking. 
B) stick. 
C) both of these 
D) neither of these A

Question 4

Food in a pressure cooker is cooked faster due to

Accepted Answer

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

Question 5

Melting snow tends to

Accepted Answer

A) warm the surrounding air. 
B) cool the surrounding air. 
C) neither of these 
A) warm the surrounding air. 
B) cool the surrounding air. 
C) neither of these

Question 6

The minimum amount of steam at 100°C needed to melt 1 gram of 0°C ice is

Accepted Answer

A) 0.125 gram. 
B) 0.148 gram. 
C) 6.75 grams. 
D) 8 grams. 
E) none of the above 
A) 0.125 gram. 
B) 0.148 gram. 
C) 6.75 grams. 
D) 8 grams. 
E) none of the above

Question 7

Water can be brought to a boil by

Accepted Answer

A) applying heat. 
B) reducing air pressure on its surface. 
C) both of these 
D) neither of these 
A) applying heat. 
B) reducing air pressure on its surface. 
C) both of these 
D) neither of these

Question 8

You can add heat without raising temperature to

Accepted Answer

A) ice. 
B) boiling water. 
C) both of these 
D) neither of these 
A) ice. 
B) boiling water. 
C) both of these 
D) neither of these

Question 9

To melt 50 grams of 0-degree-Celsius ice requires

Accepted Answer

A) 25 calories. 
B) 50 calories. 
C) 80 calories. 
D) none of the above 
A) 25 calories. 
B) 50 calories. 
C) 80 calories. 
D) none of the above

Question 10

The toy drinking bird nicely illustrates

Accepted Answer

A) evaporation. 
B) condensation. 
C) both of these 
D) neither of these 
A) evaporation. 
B) condensation. 
C) both of these 
D) neither of these

Question 11

To melt ice, add

Accepted Answer

A) temperature. 
B) energy. 
C) force. 
D) time. 
A) temperature. 
B) energy. 
C) force. 
D) time.

Question 12

In one word, how can water in the power plant of a nuclear submarine far exceed 100°C?

Accepted Answer

A) conductivity 
B) evaporation 
C) condensation 
D) pressure 
E) vaporization 
A) conductivity 
B) evaporation 
C) condensation 
D) pressure 
E) vaporization

Question 13

When vapor transforms to a plasma, energy must be

Accepted Answer

A) absorbed by the vapor. 
B) released from the vapor. 
C) both of these 
D) neither of these 
A) absorbed by the vapor. 
B) released from the vapor. 
C) both of these 
D) neither of these

Question 14

In a heat pump, cooling is accomplished when

Accepted Answer

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

Question 15

The temperature at which water freezes is the same as the temperature at which

Accepted Answer

A) ice melts. 
B) water boils in a pressure cooker. 
C) both of these 
D) neither of these 
A) ice melts. 
B) water boils in a pressure cooker. 
C) both of these 
D) neither of these

Question 16

When water freezes, the surrounding air is

Accepted Answer

A) cooled. 
B) warmed. 
C) both of these 
D) neither of these 
A) cooled. 
B) warmed. 
C) both of these 
D) neither of these

Question 17

As a block of ice at 0°C melts, the block absorbs energy

Accepted Answer

A) and decreases in temperature. 
B) and increases in temperature. 
C) without a temperature change. 
D) all of the above 
E) none of the above 
A) and decreases in temperature. 
B) and increases in temperature. 
C) without a temperature change. 
D) all of the above 
E) none of the above

Question 18

When a vapor condenses, energy is

Accepted Answer

A) absorbed by the vapor. 
B) released from the vapor. 
C) both of these 
D) neither of these 
A) absorbed by the vapor. 
B) released from the vapor. 
C) both of these 
D) neither of these

Question 19

What occurs in a pan of water placed outdoors on a warm day?

Accepted Answer

A) evaporation 
B) condensation 
C) both of these 
D) neither of these 
A) evaporation 
B) condensation 
C) both of these 
D) neither of these

Question 20

A heat pump can

Accepted Answer

A) cool an environment. 
B) warm an environment. 
C) both of these 
D) neither of these 
A) cool an environment. 
B) warm an environment. 
C) both of these 
D) neither of these

Exam 17: Change of Phase

When you walk barefoot on red-hot wooden coals it is best if

A canteen that is wet on the outside results in water inside that is

When fast-moving water molecules collide they tend to

Food in a pressure cooker is cooked faster due to

Melting snow tends to

The minimum amount of steam at 100°C needed to melt 1 gram of 0°C ice is

Water can be brought to a boil by

You can add heat without raising temperature to

To melt 50 grams of 0-degree-Celsius ice requires

The toy drinking bird nicely illustrates

To melt ice, add

In one word, how can water in the power plant of a nuclear submarine far exceed 100°C?

When vapor transforms to a plasma, energy must be

In a heat pump, cooling is accomplished when

The temperature at which water freezes is the same as the temperature at which

When water freezes, the surrounding air is

As a block of ice at 0°C melts, the block absorbs energy

When a vapor condenses, energy is

What occurs in a pan of water placed outdoors on a warm day?

A heat pump can

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