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Ch 14
Test Description: Ch 14 heat
Instructions: Answer all questions to get your test result.
1) An engine transforms chemical energy of fuel into work done by
A
friction
B
pistons
C
carburetor
D
spark plugs
2) As the kinetic energy of molecules in a substance increases, the
A
temperature of the substance decreases
B
temperature of the substance increases
C
potential energy of the substance changes
D
temperature remains the same
3) Energy from the sun reaches the Earth by
A
conduction
B
radiation
C
conduction and radiation
D
conduction and convection
4) The transfer of energy by the movement of fluids or gases with different temperatures is called
A
radiation
B
contact
C
conduction
D
convection
5) according to the first law of thermodynamics
A
there is no such thing as perpetual motion
B
the total energy used in any process is conserved
C
in any process there is a decrease in potential energy
D
the energy of a system in constant
6) a cold blooded reptile basks on a warm rock in the sun. It is warmed by
A
radiation
B
conduction and convection
C
convection
D
conduction
7) which of the following is a temperature scale
A
Celsius
B
Farenheit
C
Kelvin
D
all of the answers are correct
8) the total amount of energy (both usable and unusable) in any process
A
remains constant
B
decreases
C
varies
D
increases
9) the transfer of energy as heat caused by the collision of molecules is called
A
contact
B
conduction
C
convection
D
radiation
10) convection currents rise in air because
A
hot air rises and cold air remains stagnant
B
hot air has less friction
C
cool air descends and hot air ascends
D
the molecules in hot air move faster
*select an answer for all questions
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