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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
pistons
D
carburetor
2) As the kinetic energy of molecules in a substance increases, the
A
temperature remains the same
B
temperature of the substance increases
C
potential energy of the substance changes
D
temperature of the substance decreases
3) Energy from the sun reaches the Earth by
A
conduction and convection
B
conduction and radiation
C
radiation
D
conduction
4) The transfer of energy by the movement of fluids or gases with different temperatures is called
A
convection
B
conduction
C
radiation
D
contact
5) when energy is transformed the amount of usable energy
A
decreases
B
remains constant
C
increases
D
none of the answers are correct
6) Ta cold blooded reptile basks on a warm rock in the sun. Its body is warmed by
A
conduction
B
radiation and conduction
C
radiation
D
convection
7) which is a temperature scale
A
celsius
B
kelvin
C
all of the answers are correct
D
fahrenheit
8) The total amount of energy in any process
A
varies
B
increases
C
decreases
D
remains the same
9) the transfer of energy as heat caused by the collision of molecules is called
A
convection
B
radiation
C
contact
D
conduction
10) convection currents rise in aire because
A
cool air descends and hot air rises
B
hot air has less friction
C
hot air rised and cold air remains stagnant
D
the molecules in hot air move faster
*select an answer for all questions
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