5.4 Unit test

Which of these best completes the circuit?

• Rubber band

• Metal nail

• Leather shoelace

• Wooden toothpick

Which of these materials is a good conductor of electricity?

• Rubber

• Glass

• Metal

• Newspaper

Electric lights will not come on unless their electrical circuit is a -

• Parallel circuit

• Series circuit

• Closed circuit

• Short circuit

A fifth-grade class constructed this circuit. Which of these objects most likely made the light glow when connected to points X and Y?

• Plastic straw

• Cotton string

• Aluminum foil

• Rubber eraser

Tags

NGSS.4-PS3-2

A class prepared some electric circuits using battery, connecting wires, and three light bulbs. Which of these circuits can make the three bulbs light?

• A

• B

• C

• D

Tags

NGSS.4-PS3-2

NGSS.3-5-ETS1-1

NGSS.3-5-ETS1-2

Which of these substances conducts electricity the best?

• Wood

• Brick

• Copper

• Plastic

The electrician in this picture is wearing rubber gloves for protection. The purpose of the rubber gloves is to

• Keep the electrician dry

• Create an electrical circuit

• Produce electricity

• Insulate the electrician

What material would be safest to use as an insulator to cover electrical wires?

• Aluminum

• Tin

• Rubber

• Water

Copper wire is often wrapped in plastic. Plastic material is a good

• Electromagnet

• Insulator

• Circuit

• Current

Many electrical wires are wrapped with a plastic coating because plastic is

• Less expensive than steel

• More dense than copper

• Able to keep its shape

• A good insulator