Test 4: Review A Flashcards
Heat energy travels from an object with a high
A) temperature to an object with a lower temperature.
B) internal energy to an object with a lower internal energy.
C) Both of these, for they say essentially say the same thing.
D) None of the above choices are true.
*A) temperature to an object with a lower temperature.
Ice tends to form first at the
A) surface of bodies of water.
B) bottom of bodies of water.
C) surface or bottom depending on the water depth.
*A) surface of bodies of water.
The fact that a thermometer “takes its own temperature” illustrates
A) thermal equilibrium.
B) the fact that molecules are constantly moving.
C) energy conservation.
D) the difference between heat and internal energy.
*A) thermal equilibrium.
The moderate temperatures of islands throughout the world has much to do with water’s
A) vast supply of internal energy.
B) poor conductivity.
C) absorption of solar energy.
D) high evaporation rate.
E) high specific heat.
*E) high specific heat.
Microscopic slush in water tends to make the water density
A) greater.
B) less.
C) no change
*B) less.
When an iron ring is heated, the hole becomes
A) larger.
B) smaller.
C) neither smaller nor larger.
D) either smaller or larger, depending on the ring thickness.
*A) larger.
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) copper expands more than iron.
B) copper gets hotter before iron.
C) iron expands more than copper.
D) iron gets hotter before copper.
E) none of these
*A) copper expands more than iron.
Which of the following expands most when the temperature is increased? Equal volumes of
A) iron.
B) helium.
C) wood.
D) ice water.
E) All expand the same
B) helium.
Which of the following expands most when the temperature is lowered? Equal volumes of
A) helium.
B) water at 4 degrees C.
C) wood.
D) iron.
E) None expands when the temperature is lowered.
*B) water at 4 degrees C.
Can a sample of water possibly have the same volume after being warmed by several Celsius degrees?
A) always
B) sometimes
C) never
*B) sometimes
Room temperature on the Kelvin scale is about
A) 300 K.
B) 100 K.
C) 200 K.
D) 400 K.
E) more than 400 K.
*A) 300 K.
Some molecules absorb large amounts of energy in the form of internal vibrations and rotations. Materials composed of such molecules have
A) high specific heats.
B) low specific heats.
C) none of the above
*A) high specific heats.
The temperature at the bottom of Lake Tahoe, high in the Sierra Nevada Mountains in California, at this moment is
A) 4 degrees C.
B) below 4 degrees C.
C) above 4 degrees C.
D) uncertain.
*A) 4 degrees C.
Place a kilogram block of iron at 40 degrees C into a kilogram of water at 20 degrees C and the final temperature of the two becomes
A) at or about 30 degrees C.
B) less than 30 degrees C.
C) more than 30 degrees C.
*B) less than 30 degrees C.
Energy transfer by convection is primarily restricted to
A) gases.
B) fluids.
C) liquids.
D) solids.
E) none of these
*B) fluids.
A good heat conductor is
A) a poor insulator.
B) a good insulator.
C) neither a poor nor a good insulator.
*A) a poor insulator.
At the same temperature, which move with the greater speed in the air?
A) heavier molecules
B) very light molecules
C) All will have equal average speeds.
*B) very light molecules
If a solid object radiates more energy than it absorbs, its
A) internal energy and temperature decrease.
B) internal energy decreases.
C) temperature decreases.
D) None of the above choices are true.
*B) internal energy decreases.
Wrapping a hot potato in aluminum foil significantly reduces the rate at which it loses energy by
A) radiation.
B) convection.
C) conduction.
*B) convection.
Which body glows with electromagnetic waves?
A) both the Sun and the Earth
B) only the Sun
C) only the Earth
D) neither the Sun or the Earth
*A) both the Sun and the Earth
