Question 1

Steam burns are much more damaging than boiling-water burns because steam

Accepted Answer

A) has a higher temperature. 
B) contains more thermal energy. 
C) is hotter. 
D) is gaseous. 
A) has a higher temperature. 
B) contains more thermal energy. 
C) is hotter. 
D) is gaseous.

Question 2

From a molecular point of view, explain why evaporation is a cooling process. What cools?

Accepted Answer

Evaporation is the change of phase from

Question 3

A good heat conductor is a

Accepted Answer

A) poor insulator. 
B) good insulator. 
C) neither 
A) poor insulator. 
B) good insulator. 
C) neither

Question 4

Suppose you are served coffee at a restaurant before you are ready to drink it. In order for it to be the hottest when you are ready for it, you should add cream

Accepted Answer

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

Question 5

Metals are both good heat and electrical conductors due to

Accepted Answer

A) similar thermal and electrical conductive properties. 
B) looseness of outer electrons in metal atoms. 
C) relatively high densities of metals. 
D) high elasticity of metals. 
E) ability of metals to transfer energy easily. 
A) similar thermal and electrical conductive properties. 
B) looseness of outer electrons in metal atoms. 
C) relatively high densities of metals. 
D) high elasticity of metals. 
E) ability of metals to transfer energy easily.

Question 6

Objects that are good radiators generally

Accepted Answer

A) absorb radiation relatively well. 
B) reflect radiation relatively well. 
C) both 
D) neither 
A) absorb radiation relatively well. 
B) reflect radiation relatively well. 
C) both 
D) neither

Question 7

Which is not a phase of matter?

Accepted Answer

A) solids 
B) liquids 
C) gases 
D) vacuum 
A) solids 
B) liquids 
C) gases 
D) vacuum

Question 8

The interior of a greenhouse emits long-wavelength radiation due to its

Accepted Answer

A) green color. 
B) plant cell structure. 
C) transparency. 
D) temperature. 
A) green color. 
B) plant cell structure. 
C) transparency. 
D) temperature.

Question 9

When a volume of air is compressed, its temperature

Accepted Answer

A) increases. 
B) decreases. 
C) neither 
A) increases. 
B) decreases. 
C) neither

Question 10

When steam condenses to water, energy is

Accepted Answer

A) absorbed. 
B) released. 
C) conserved as the phase change occurs. 
D) transformed to a different form. 
A) absorbed. 
B) released. 
C) conserved as the phase change occurs. 
D) transformed to a different form.

Question 11

Sublimation is a change of phase from solid to gas without

Accepted Answer

A) passing through the liquid phase. 
B) a transfer of energy. 
C) a change of temperature. 
A) passing through the liquid phase. 
B) a transfer of energy. 
C) a change of temperature.

Question 12

Glass and the atmosphere are largely opaque to

Accepted Answer

A) infrared light. 
B) visible light. 
C) ultraviolet light. 
A) infrared light. 
B) visible light. 
C) ultraviolet light.

Question 13

The number of grams of ice that can be melted by 1 g of 100°C steam is

Accepted Answer

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

Question 14

Your toes feel warmer on a rug than on a tile floor because the rug

Accepted Answer

A) is usually warmer than tile. 
B) is a better insulator than tile. 
C) has more thermal energy than tile. 
D) all of the above 
E) none of the above 
A) is usually warmer than tile. 
B) is a better insulator than tile. 
C) has more thermal energy than tile. 
D) all of the above 
E) none of the above

Question 15

A friend says that a can of beverage will cool faster in the coldest part of a refrigerator. Knowledge of Newton's law of cooling

Accepted Answer

A) supports this statement. 
B) shows this statement is false. 
C) none of the above 
A) supports this statement. 
B) shows this statement is false. 
C) none of the above

Question 16

If a volume of air is warmed, it expands. If a volume of air expands, it

Accepted Answer

A) warms. 
B) cools. 
C) neither 
A) warms. 
B) cools. 
C) neither

Question 17

Glass in a florist's greenhouse blocks radiation of

Accepted Answer

A) high frequency. 
B) low frequency. 
C) all frequencies. 
A) high frequency. 
B) low frequency. 
C) all frequencies.

Question 18

A good insulator

Accepted Answer

A) slows heat transfer. 
B) prevents heat transfer. 
C) quickens heat transfer. 
A) slows heat transfer. 
B) prevents heat transfer. 
C) quickens heat transfer.

Question 19

Cold water will warm to room temperature faster in a

Accepted Answer

A) black pot. 
B) silver pot. 
C) depends on size, not color. 
A) black pot. 
B) silver pot. 
C) depends on size, not color.

Question 20

The higher the temperature of an object, the

Accepted Answer

A) higher frequency it radiates. 
B) lower frequency it radiates. 
C) none of the above 
A) higher frequency it radiates. 
B) lower frequency it radiates. 
C) none of the above

Exam 7: Heat Transfer and Change of Phase

Steam burns are much more damaging than boiling-water burns because steam

From a molecular point of view, explain why evaporation is a cooling process. What cools?

A good heat conductor is a

Suppose you are served coffee at a restaurant before you are ready to drink it. In order for it to be the hottest when you are ready for it, you should add cream

Metals are both good heat and electrical conductors due to

Objects that are good radiators generally

Which is not a phase of matter?

The interior of a greenhouse emits long-wavelength radiation due to its

When a volume of air is compressed, its temperature

When steam condenses to water, energy is

Sublimation is a change of phase from solid to gas without

Glass and the atmosphere are largely opaque to

The number of grams of ice that can be melted by 1 g of 100°C steam is

Your toes feel warmer on a rug than on a tile floor because the rug

A friend says that a can of beverage will cool faster in the coldest part of a refrigerator. Knowledge of Newton's law of cooling

If a volume of air is warmed, it expands. If a volume of air expands, it

Glass in a florist's greenhouse blocks radiation of

A good insulator

Cold water will warm to room temperature faster in a

The higher the temperature of an object, the

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Timereading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: the Nature of Science

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