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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
spark plugs
B
friction
C
carburetor
D
pistons
2) As the kinetic energy of molecules in a substance increases, the
A
temperature of the substance decreases
B
potential energy of the substance changes
C
temperature of the substance increases
D
temperature remains the same
3) Energy from the sun reaches the Earth by
A
conduction and convection
B
conduction
C
radiation
D
conduction and radiation
4) The transfer of energy by the movement of fluids or gases with different temperatures is called
A
radiation
B
contact
C
convection
D
conduction
5) according to the first law of thermodynamics
A
the energy of a system in constant
B
in any process there is a decrease in potential energy
C
the total energy used in any process is conserved
D
there is no such thing as perpetual motion
6) a cold blooded reptile basks on a warm rock in the sun. It is warmed by
A
conduction and convection
B
radiation
C
convection
D
conduction
7) which of the following is a temperature scale
A
all of the answers are correct
B
Celsius
C
Kelvin
D
Farenheit
8) the total amount of energy (both usable and unusable) in any process
A
varies
B
decreases
C
remains constant
D
increases
9) the transfer of energy as heat caused by the collision of molecules is called
A
conduction
B
radiation
C
convection
D
contact
10) convection currents rise in air because
A
hot air has less friction
B
hot air rises and cold air remains stagnant
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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