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8th Grade Ch 5
Test Description: Thermal energy
Instructions: Answer all questions to get your test result.
1) The greater the average distance between particles
A
the greater the potential energy of the particles
B
the less the kinetic energy of the particles
C
the less the potential energy of the particles
D
the stronger the attraction between them
2) The sum of the kinetic energy and the potential energy of the particles that make up a material
A
thermal energy
B
electric energy
C
mechanical energy
D
solar energy
3) The average kinetic energy of the particles that make up a material
A
temperature
B
thermal energy
C
heat
D
mechanical energy
4) The greater the average kinetic energy of particles
A
the less they move around
B
the greater the temperature
C
the less the temperature
D
the more likely you'll have to wear a coat
5) Which temperature scale has water freezing at 32 degrees?
A
Kelvin
B
Celsius
C
Fahrenheit
6) What is absolute zero?
A
the temperature at which water freezes on the Celsius scale
B
the temperature at which particles have no kinetic energy
C
the temperature needed to cause brain freeze
D
the coldest temperature ever reached in the US
7) The movement of thermal energy from a warmer object to a cooler object is called
A
equilibrium
B
thermal energy
C
temperature
D
heat
8) Heating continues until all object in contact are the same temperature.
A
False
B
True
9) The transfer of thermal energy from one material to another by electromagnetic wave is called
A
radiation
B
conduction
C
convection
10) The transfer of thermal energy between materials by the collision of particles is called
A
radiation
B
convection
C
conduction
11) Metal is considered a thermal insulator.
A
true
B
false
12) A material with a low specific heat takes a lot of energy to change its temperature.
A
true
B
false
13) A decrease in a materials's volume when its temperature decreases
A
thermal expansion
B
thermal conduction
C
thermal convection
D
thermal contraction
14) In a pot of boiling water, the cooler water
A
sinks
B
stays in the middle
C
rises
15) Thermal energy can be converted into other forms of energy.
A
false
B
true
16) A device that regulates the temperature of a system is called a
A
thermostat
B
heat engine
C
thermomoeter
D
refrigerator
17) What happens to the coolant in a refrigerator when it goes through an expansion valve?
A
it turns to a solid
B
it drips out and explodes
C
it turns to a liquid
D
it turns to a gas
18) Where is the piston located?
A
in the expansion valve of a refrigerator
B
in the cylinder of a heat engine
C
in the burner of a stove
D
attached to the bimetallic coil of a thermostat
19) Heat engines are very efficient
A
true
B
false
20) What ignites the fuel-air mixture in a heat engine?
A
the cylinder
B
the piston
C
the intake valve
D
the spark plug
*select an answer for all questions
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