PCS

If you were building a circuit, why would you use copper and not rubber to send electricity through the circuit?

• Copper is a better insulator. 
• Rubber is a better conductor.
• Copper is an insulator, but rubber is a conductor. 
• Copper is a conductor, but rubber is an insulator. 

Turning on a light bulb in a lamp demonstrates that electrical energy can be used to produce which of the following?

• light and heat energy
• sound and light energy

• heat and sound energy

• heat and mechanical energy

Hot-air balloons rise when a burner, positioned under the opening of the balloon, uses the gas propane to create a blast of fire. What form of energy causes a hot-air balloon to rise into the air? 

• mechanical energy

• light energy

• heat energy

• electrical energy

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What is a closed circuit?

• a circuit with at least two different forms of energy

• a circuit that allows the flow of electricity

• a circuit that does not allow the flow of electricity

• a circuit that allows all forms of energy to pass through

What is an open circuit?

• a circuit with at least two different forms of energy

• a circuit that allows the flow of electricity

• a circuit that does not allow the flow of electricity

• a circuit that allows all forms of energy to pass through

Which material could fill in the gap for a circuit to create a closed circuit?

• metal spoon

• rubber ball

• plastic spoon

• construction paper

Why type of circuit is shown in the picture below?

• magnetic loop

• open circuit

• this is not a circuit

• closed circuit

What is the source of energy in the circuit above?

• Light bulb

• Battery

• Wire

• Rubber covering

An object is added to the spot in Circuit B but the light bulb does not illuminate. What might be the problem?

• The object added was an insulator.

• The object added was a conductor.

• The object was made of metal.

• The object created a closed circuit.

What is the purpose of the rubber coating on wires?

• serves as a conductor for the circuit

• prevents the light bulb from using up too much energy

• serves as an insulator for protection

• closes the circuit