Insulators and Conductors
Is steel an insulator or a conductor?
Conductor
True or False. Conduction is heat transfer by the circulation of a liquid or a gas.
False
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Which type of circuits do houses typically have? Parallel or Series?
Parallel circuits
True or False. Energy is always transferred from hot to cold.
True
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True or False. The law of conservation of energy says that energy can be neither created nor destroyed.
True
Is rubber an insulator or a conductor?
Insulator
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True or False. Radiation is heat transfer through matter or empty space through electromagnetic waves.
True
True or False. When a circuit is open the light will turn on.
False. Open circuits stop electricity from flowing.
An object expands when the temperature of the object
A. increases
B. decreases
A. increases
What material are wires typically made out of?
A. steel
B. copper
C. playdoh
D. plastic
C. Copper
Is wood an insulator or a conductor?
Insulator
True or False. Conduction is heat transfer through fluids.
False. Convection is heat transfer through fluids.
For energy to be able to flow, an electrical device needs a complete:
A. circuit
B. current
C. path
D. bridge
A. circuit
Energy is transferred from the Sun to the Earth mainly by.
A. Conduction
B. Electromagnetic waves
C. Air currents
D. Mechanical waves
B. Electromagnetic waves
What kind of energy causes an ice cube to melt?
A. Thermal
B. Mechanical
C. Magnetic
D. Sound
A. Thermal
Is plastic an insulator or a conductor?
Insulator
Conduction is heat transfer through:
A. Electromagnetic waves
B. Gases and liquids
C. Currents
D. Touch
D. Touch
If a circuit is closed. . .
A. there is no energy flowing
B. the lights will be on
C. nothing will happen
D. the lights will be off
B. the lights will be on
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Thermal energy is transferred through a collision of
A. hot things
B. atoms
C. molecules
D. light
B. atoms
A fluid is a. . .
A. gas
B. liquid
C. solid
D. gas or liquid
D. gas or liquid
Is play-doh an insulator or a conductor?
Conductor
Why does cold water sink in a convection current?
A. because it is lighter than warm water
B. because it is heavier than warm water
C. because it is colder
D. because it is more dense than warm water
D. because it is more dense than warm water
True or false. In a parallel circuit, if one bulb burns out, all of the bulbs on the circuit also burn out.
False. This happens in a series circuit, not a parallel circuit.
A. expansion
B. conduction
C. equilibrium
D. the warmest temperature
C. equilibrium
In a convection current why does warm air rise?
A. It is more dense than cold air.
B. It is less dense than cold air.
C. It has less mass than cold air.
D. It is hotter than cold air.
B. It is less dense than cold air.
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