Ch 14 Question Preview (ID: 6220)
Ch 14 Heat.
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An engine transforms chemical energy of fuel into work done by
a) carburetor
b) friction
c) spark plugs
d) pistons
As the kinetic energy of molecules in a substance increases, the
a) temperature of the substance increases
b) temperature of the substance decreases
c) potential energy of the substance changes
d) temperature remains the same
Energy from the sun reaches the Earth by
a) conduction and radiation
b) radiation
c) conduction and convection
d) conduction
The transfer of energy by the movement of fluids or gases with different temperatures is called
a) convection
b) conduction
c) contact
d) radiation
when energy is transformed the amount of usable energy
a) decreases
b) remains constant
c) increases
d) none of the answers are correct
Ta cold blooded reptile basks on a warm rock in the sun. Its body is warmed by
a) radiation
b) conduction
c) convection
d) radiation and conduction
which is a temperature scale
a) kelvin
b) celsius
c) fahrenheit
d) all of the answers are correct
The total amount of energy in any process
a) increases
b) decreases
c) remains the same
d) varies
the transfer of energy as heat caused by the collision of molecules is called
a) convection
b) conduction
c) contact
d) radiation
convection currents rise in aire because
a) hot air rised and cold air remains stagnant
b) cool air descends and hot air rises
c) the molecules in hot air move faster
d) hot air has less friction
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