8th Grade Ch 5 Question Preview (ID: 41113)


Thermal Energy. TEACHERS: click here for quick copy question ID numbers.

In a pot of boiling water, the cooler water
a) rises
b) sinks
c) stays in the middle
d)

A decrease in a materials's volume when its temperature decreases
a) thermal conduction
b) thermal contraction
c) thermal convection
d) thermal expansion

A material with a low specific heat takes a lot of energy to change its temperature.
a) true
b) false
c)
d)

Metal is considered a thermal insulator.
a) true
b) false
c)
d)

The transfer of thermal energy between materials by the collision of particles is called
a) convection
b) conduction
c) radiation
d)

The transfer of thermal energy from one material to another by electromagnetic wave is called
a) convection
b) conduction
c) radiation
d)

Heating continues until all object in contact are the same temperature.
a) True
b) False
c)
d)

The movement of thermal energy from a warmer object to a cooler object is called
a) temperature
b) heat
c) thermal energy
d) equilibrium

Which temperature scale has water freezing at 32 degrees?
a) Fahrenheit
b) Celsius
c) Kelvin
d)

What is absolute zero?
a) the temperature at which water freezes on the Celsius scale
b) the coldest temperature ever reached in the US
c) the temperature needed to cause brain freeze
d) the temperature at which particles have no kinetic energy

The greater the average kinetic energy of particles
a) the less the temperature
b) the less they move around
c) the greater the temperature
d) the more likely you'll have to wear a coat

The average kinetic energy of the particles that make up a material
a) thermal energy
b) temperature
c) mechanical energy
d) heat

The sum of the kinetic energy and the potential energy of the particles that make up a material
a) mechanical energy
b) thermal energy
c) electric energy
d) solar energy

The greater the average distance between particles
a) the greater the potential energy of the particles
b) the less the potential energy of the particles
c) the less the kinetic energy of the particles
d) the stronger the attraction between them

Thermal energy can be converted into other forms of energy.
a) true
b) false
c)
d)

A device that regulates the temperature of a system is called a
a) thermomoeter
b) refrigerator
c) thermostat
d) heat engine

What happens to the coolant in a refrigerator when it goes through an expansion valve?
a) it turns to a liquid
b) it turns to a solid
c) it turns to a gas
d) it drips out and explodes

Where is the piston located?
a) in the expansion valve of a refrigerator
b) attached to the bimetallic coil of a thermostat
c) in the cylinder of a heat engine
d) in the burner of a stove

Heat engines are very efficient
a) true
b) false
c)
d)

What ignites the fuel-air mixture in a heat engine?
a) the piston
b) the cylinder
c) the intake valve
d) the spark plug

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