Question # 1 (Multiple Choice) On a sunny day, your clothing becomes hot because

A) light is absorbed and changed to heat
B) light and heat are reflected off clothing
C) heat and light are transmitted from clothing
D) heat is transmitted and light is reflected

Question # 2 (Multiple Answer) Whenever bonds between atoms are broken and rearranged:

A) energy was involved
B) an exothermic reaction has taken place
C) a chemical change occurred
D) a liquid has evaporated
E) melting has occurred

Question # 3 (Multiple Answer) Since the electrolysis of water stops when the current is turned off the process is

A) exothermic
B) a physical change
C) dull
D) endothermic
E) a chemical change

Question # 4 (Multiple Choice) A mercury thermometer is constructed at

A) room temperature
B) a temperature higher than the maximum of the thermometer
C) a temperature lower than the minimum of the thermometer
D) atmospheric pressure

Question # 5 (Multiple Answer) In a mercury thermometer, the amount of expansion of the mercury for each degree increase in temperature

A) increases
B) decreases
C) is the same
D) increases then decreases

Question # 6 (Multiple Answer) Pressure cookers allow food to cook more rapidly due to

A) lower melting-freezing points
B) higher boiling points
C) higher melting-freezing points
D) lower boiling points

Question # 7 (Multiple Choice) When heat is absorbed

A) molecules move more slowly
B) molecules move more rapidly
C) there is no change in molecular motion
D) temperature remains unchanged

Question # 8 (Multiple Answer) A change in potential energy does not occur when

A) a bowstring is pulled back
B) a lead block rest on the ground
C) a liquid evaporates
D) an airplane descends
E) a spring is at rest position

Question # 9 (Multiple Answer) The specific heat of iorn is 0.11 cal/g degree C; the amount of heat needed to raise the temperature of 20. grams of iron 50. degrees C is

A) 11 cal
B) 110 cal
C) 6.0 J
D) 603 J

Question # 10 (Multiple Answer) The heat needed to change 1 gram of ice at 0 degrees C to 1 gram of water at 0 degrees C is a way of defining

A) latent heat of fusion of water
B) internal heat content of water
C) thermal equilibrium coefficient of water
D) specific heat capacity of water
E) latent heat of vaporization of water

Question # 11 (Multiple Answer) Studies of the expansion of metals show that different metals

A) expand at different rates when heated
B) expand at different rates when cooled
C) expand at the same rate when heated
D) expand at the same rates when cooled

Question # 12 (Multiple Choice) When objects are at different temperatures

A) heat is not transferred
B) heat is transferred from the cooler object to the warmer object
C) heat is transferred from the warmer object to the cooler object

Question # 13 (Multiple Choice) Force per unit area is an expression of

A) energy
B) work
C) pressure
D) power

Question # 14 (Multiple Answer) Movement of a number of molecules from an area of high concentration to an area of lower concentration is an example of

A) gas diffraction
B) diffusion
C) permeability
D) osmosis

Question # 15 (Multiple Answer) Of the following thermometers, the one best suited to measure temperatures below the freezing point of water contain

A) dry ice
B) alcohol
C) mercury
D) water

Question # 16 (Multiple Answer) Light and heat energy travel through space at a speed of

A) 186 282 mile per second
B) 3 E 8 m/s
C) 186 282 feet per second
D) 3 E 12 m/s

Question # 17 (Multiple Answer) Liquids, when heated,

A) do not expand
B) expand at the same rate
C) expand at different rates
D) contract but do not expand