Ch 14: Question Preview (ID: 6220)

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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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