Ch 14: Question Preview (ID: 6221)

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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
according to the first law of thermodynamics
a) there is no such thing as perpetual motion b) the energy of a system in constant c) the total energy used in any process is conserved d) in any process there is a decrease in potential energy
a cold blooded reptile basks on a warm rock in the sun. It is warmed by
a) radiation b) conduction c) convection d) conduction and convection
which of the following is a temperature scale
a) Celsius b) Farenheit c) Kelvin d) all of the answers are correct
the total amount of energy (both usable and unusable) in any process
a) increases b) decreases c) remains constant 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 air because
a) hot air rises and cold air remains stagnant b) cool air descends and hot air ascends c) the molecules in hot air move faster d) hot air has less friction
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