Chapter 17 Test

11) When fast-moving water molecules collide they tend to A) rebound without sticking. B) stick. C) both of these D) neither of these

A

16) Evaporation is a cooling process and condensation is A) a warming process. B) a cooling process also. C) neither of these

A

2) The molecules in a room-temperature glass of water jostle around at A) a great variety of speeds. B) much the same rates of speed. C) a very small range of speeds.

A

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

A

22) Food in a pressure cooker is cooked faster due to 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

28) Increased air pressure on the surface of hot water tends to A) prevent boiling. B) promote boiling. C) both of these D) neither of these

A

38) The temperature at which water freezes is the same as the temperature at which A) ice melts. B) water boils in a pressure cooker. C) both of these D) neither of these

A

40) Foreign ions introduced to water A) lower the freezing point of water. B) raise the freezing point of water. C) do not affect water's freezing point.

A

42) To illustrate regelation with ice it is important that a A) wire is used. B) string is used. C) either of these D) none of the above

A

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

44) If bits of the coals do not stick to your feet while walking barefoot on red-hot coals, it would be best if your feet are A) wet. B) dry. C) warm. D) cold. E) very hot.

A

47) When a solid melts, energy is A) absorbed by the solid. B) released by the solid. C) both of these D) neither of these

A

49) When a gas is changed to a liquid, the gas A) releases energy. B) absorbs energy. C) both of these D) neither of these

A

5) A hot dog pants A) to enable evaporation in its mouth and bronchial tract. B) to provide more oxygen into its lungs. C) to impress dogs of the opposite sex. D) none of the above

A

51) When vapor transforms to a plasma, energy must be A) absorbed by the vapor. B) released from the vapor. C) both of these D) neither of these

A

59) When ice crystals form in clouds, the surrounding air A) warms. B) cools. C) neither of these

A

6) The surface of hot water has a relatively high rate of A) evaporation. B) condensation. C) conductivity. D) convection.

A

12) When slow-moving water molecules collide they tend to A) rebound without sticking. B) stick. C) both of these D) neither of these

B

15) When a geyser erupts, pressure at its bottom A) increases. B) decreases. C) is unaffected D) all of the above E) none of the above

B

17) A boy scout will be burned more severely by A) 100 g of water at 100°C. B) 100 g of steam at 100°C. C) both about equally D) neither of these

B

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

B

27) For increased atmospheric pressure, the boiling point of water A) goes down. B) rises. C) remains at 100 degrees C.

B

29) Compared to sea level, water in an open pot in the mountains boils at A) a higher temperature. B) a lower temperature. C) the same temperature. D) none of the above

B

33) A good cook knows that the temperature of violently boiling water is A) higher than that of simmering water. B) the same as that of simmering water. C) actually lower than 100°C. D) neither of the above

B

35) Water in a car radiator sometimes boils explosively when the radiator cap is removed, which is due to sudden A) rapid evaporation. B) reduced pressure. C) excess condensation. D) excess vaporization.

B

36) 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 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 above

B

37) The addition of salt to water affects its A) crystal composition. B) freezing point. C) viscosity. D) liquidity. E) none of the above

B

39) The temperature at which a liquid freezes is A) affected by foreign ions. B) the same temperature at which its solid form melts. C) both of these D) neither of these

B

45) To melt ice, add A) temperature. B) energy. C) force. D) time.

B

46) When a solid is changed to a liquid, the solid A) releases energy. B) absorbs energy. C) both of these D) neither of these

B

48) When liquids change to a solids, they A) absorb energy. B) release energy. C) both of these D) neither of these

B

50) When a vapor condenses, energy is A) absorbed by the vapor. B) released from the vapor. C) both of these D) neither of these

B

52) When moth balls sublime to gas they A) absorb energy. B) release energy. C) both of these D) neither of these

B

56) When water freezes, the surrounding air is A) cooled. B) warmed. C) both of these D) neither of these

B

57) During snow fall, the surrounding air is A) cooled. B) warmed. C) both of these D) neither of these

B

58) When steam condenses, the surrounding air is A) cooled. B) warmed. C) both of these D) neither of these

B

60) Melting snow tends to A) warm the surrounding air. B) cool the surrounding air. C) neither of these

B

8) A canteen that is wet on the outside results in water inside that is A) warmer. B) cooler. C) both of these D) neither of these

B

1) Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools by A) conduction. B) condensation. C) evaporation. D) melting.

C

10) The toy drinking bird nicely illustrates A) evaporation. B) condensation. C) both of these D) neither of these

C

14) The pressure at the bottom of a geyser is 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 above

C

18) Steam burns are more damaging than burns caused by boiling water because steam A) has more energy per gram than boiling water. B) releases additional energy when it condenses. C) both of these D) neither of these

C

24) Compared with sea-level cooking, in cooking eggs by boiling in mountain regions you should boil the eggs A) with a hotter flame. B) for a shorter time. C) for a longer time. D) all of the above E) none of the above

C

25) Water can be brought to a boil by A) applying heat. B) reducing air pressure on its surface. C) both of these D) neither of these

C

3) The reason that evaporation is a cooling process is 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 above

C

30) A geyser such as Old Faithful in Yellowstone Park is similar to a A) vacuum bottle. B) canteen. C) coffee percolator. D) teakettle. E) vat of molten lead.

C

31) Hydrothermal vents deep beneath the ocean surface attain temperatures far above 100°C due to A) higher salt content. B) reduced salt content. C) greater pressure. D) all of the above E) none of the above

C

4) When you blow over hot soup to cool it you are helping A) to slightly increase air pressure atop the soup surface. B) more energetic particles in the soup to escape. C) conduction, convection, and radiation. D) none of the above

C

41) Dean teaches that the phenomenon of regelation is due to the A) freezing point of water. B) melting point of ice. C) open-structured nature of ice crystals. D) high specific heat of water.

C

53) You can add heat without raising temperature to A) ice. B) boiling water. C) both of these D) neither of these

C

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

C

55) The most responsible factor for whether a substance takes the phase of solid, liquid, gas, or plasma is its A) composition. B) atomic shell configuration. C) temperature. D) none of the above

C

7) What occurs in a pan of water placed outdoors on a warm day? A) evaporation B) condensation C) both of these D) neither of these

C

9) Double-pane windows contain nitrogen rather than air to prevent A) gas escape. B) thermal conduction. C) condensation. D) heat flow.

C

26) When heat is added to boiling water, its temperature A) increases. B) decreases. C) remains unchanged. D) none of the above Answer: C

C`

13) The main difference between a fog and a cloud is A) water vapor content. B) density of vapor. C) seeding. D) altitude. E) temperature.

D

21) Morning dew on the grass is a result of A) evaporation of water. B) the open-structured form of water crystals. C) air pressure on water vapor. D) slow-moving water molecules sticking to one another.

D

23) In mountain regions, food cooked in boiling water cooks slower than when cooked at sea level. If the temperature beneath the pot of boiling water is increased, the food will cook A) faster. B) slower still. C) both of these D) neither of these

D

32) Water can be turned to ice by A) lowering the surrounding air pressure. B) extracting energy. C) both of these D) neither of these

D

34) In one word, how can water in the power plant of a nuclear submarine far exceed 100°C? A) conductivity B) evaporation C) condensation D) pressure E) vaporization

D