Unit 3, Electrical circuits

Which of the following items would best conduct electricity?

• Copper

• Plastic

• String

• Wood

Look at the incomplete circuit diagram below. Which of the following best completes this circuit?

• wooden toothpick

• plastic straw

• rubber band

• metal nail

Which of the following statements is true about a basic electrical circuit?

• No electricity will flow through a circuit without a light.

• Electricity will flow through a circuit without a source of energy.

• No electricity will flow through a circuit that has an open switch.

• Electricity will flow through a circuit that forms an incomplete loop.

The picture below shows a circuit with two light bulbs that are currently lit up. The switch is closed. What will happen to the light bulbs if the switch opens?

• Both light bulbs will turn off.

• Both light bulbs will stay on.

• The top light bulb will turn off and the bottom light bulb will stay on.

• The bottom light bulb will turn off and the top light bulb will stay on.

Which of these best describes why many electrical wires have plastic coatings on them?

• Plastic conducts electricity, so it helps the electricity flow through the wire.

• Plastic does not conduct electricity, so it helps the electricity flow through the wire.

• Plastic conducts electricity, so it keeps a person from getting shocked when handling the wire.

• Plastic does not conduct electricity, so it keeps a person from getting shocked when handling the wire.

Which of the following circuits allows for the flow of energy through the entire circuit?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-3

Tracy builds a circuit in order to light a light bulb. The circuit includes a light bulb, a battery, copper wire, and a switch. After building the circuit, Tracy finds that the bulb will not light. Which statement is NOT a possible explanation as to why the bulb remains unlit?

• The switch is open.

• The switch is closed.

• The light bulb is burned out.

• The wires in the circuit do not make a complete loop.

A ladder made of which material would be the most dangerous to use if someone were working around power lines?

• fiberglass

• metal

• plastic

• wood

A student tested different items to determine which items conduct electricity. Which list below includes only items that do NOT conduct electricity?

• rubber eraser, glass rod, plastic button

• copper wire, glass rod, steel paper clip

• steel paper clip, plastic button, glass rod

• rubber eraser, plastic button, copper wire

Ms. Davis is an electrician, she uses various tools for her work. Why is it important for Ms. Davis' tools to have plastic or rubber handles?

• Plastic and rubber are insulators.

• Plastic and rubber are great conductors.

• Plastic and rubber are more durable and last longer.

• Plastic and rubber provide a better grip for the handle.

Tags

NGSS.MS-ETS1-1