Isci:chapter 6 Quiz Questions

Front 1

1.
Heat energy travels from an object with a high

A. thermal energy to an object with a lower thermal energy.
B. temperature to an object with a lower temperature.
C. both of these, for they say essentially the same thing.

Back 1

B

Front 2

2.
Which of the following normally warms up faster when heat is applied?

A. water
B. iron
C. glass
D. wood

Back 2

B

Front 3

3.
The fact that a thermometer "takes its own temperature" illustrates


A. thermal equilibrium.
B. energy conservation.
C. the difference between heat and thermal energy.
D. the fact that molecules are constantly moving.

Back 3

A

Front 4

4.
Ice has a lower density than water because ice


A. sinks.
B. molecules are more compact in the solid state.
C. molecules vibrate at lower rates than water molecules.
D. is made of open-structured, hexagonal crystals.
E. density decreases with decreasing temperature.

Back 4

D

Front 5

5.
Compared to a giant iceberg, a hot cup of coffee has


A. more thermal energy and higher temperature.
B. higher temperature, but less thermal energy.
C. a greater specific heat and more thermal energy.
D. none of these

Back 5

B

Front 6

6.The reason that the white-hot sparks that strike your skin from a 4th-of-July-type sparkler don't harm you is because


A. they have a low temperature.
B. the energy per molecule is very low.
C. the energy per molecule is high, but the total energy transferred is small.

Back 6

C

Front 7

7.When a volume of air is compressed and no heat enters or leaves, the air temperature will

A. increase.
B. decrease.
C. remain unchanged.

Back 7

A

Front 8

8.When a volume of air expands against the environment and no heat enters or leaves, the air temperature will


A. increase.
B. decrease.
C. remain unchanged.

Back 8

B

Front 9

9.Suppose you put a closed, sealed can of air on a hot stove burner. The contained air will undergo an increase in


A. thermal energy.
B. temperature.
C. pressure.
D. all of these
E. none of these

Back 9

D

Front 10

10. When an iron ring is heated, the hole becomes


A. smaller.
B. larger.
C. neither smaller nor larger.

Back 10

B

Front 11

11.
When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. The reason for this is

A. iron gets hotter before copper.
B. copper gets hotter before iron.
C. copper expands more than iron.
D. iron expands more than copper.
E. none of these

Back 11

C

Front 12

12.
Which of the following expands most when the temperature is lowered? Equal volumes of

A. iron.
B. wood.
C. helium.
D. water at 4°C.
E. None expand when the temperature is lowered.

Back 12

D

Front 13

13.
Consider a metal ring with a gap cut in it. When the ring is heated, the gap

A. becomes narrower.
B. becomes wider.
C. retains its size.

Back 13

B

Front 14

14. A substance can absorb heat energy by the process of

A. conduction.
B. convection.
C. radiation.
D. all of these

Back 14

D

Front 15

15.
A. similarity between 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.

Back 15

B

Front 16

16.
Your feet feel warmer on a rug than on a tile floor because the rug


A. is usually warmer than tile.
B. is a better insulator than tile.
C. for the same mass has more thermal energy than tile.
D. all of these
E. none of these

Back 16

B

Front 17

17.
Objects that radiate relatively well,


A. Absorb radiation relatively well.
B. reflect radiation relatively well.
C. both absorb radiation relatively well and reflect radiation relatively well
D. neither absorb radiation relatively well nor reflect radiation relatively well

Back 17

A

Front 18

18.A good reflector of radiation is a


A. good absorber of radiation.
B. good emitter of radiation.
C. poor absorber of radiation.
D. none of these

Back 18

C

Front 19

19.A refrigerator

A. produces cold.
B. causes thermal energy to disappear.
C. removes thermal energy from inside the refrigerator.
D. changes heat into cold.
E. none of these

Back 19

C

Front 20

20.
If an object radiates more energy than it absorbs, its


A. thermal energy decreases.
B. temperature decreases.
C. both thermal energy decreases and temperature decreases
D. neither thermal energy decreases nor temperature decreases

Back 20

C