Chapter 5 Review 2--Electricity

A student wants to complete a circuit with a conductor. Which object is the best option?

• foam tubing

• aluminum foil

• glass bead

• wooden stick

Which is most likely the reason conducting wire is wrapped in plastic?

• Plastic keeps the wire cool.

• Plastic has magnetic properties.

• Plastic allows heat to move freely.

• Plastic is a good electrical insulator.

Why does a repairman wear rubber gloves while working on electrical power lines?

• to insulate his hands

• to protect the power lines

• to collect the electrical energy

• to conduct an electrical circuit

Which material would most likely be the best electrical conductor?

• glass

• plastic

• silver

• wood

Which material is the best insulator?

• copper

• nickel

• gold

• plastic

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Why are electrical outlet covers and light-switch plates made of plastic?

• Plastic is a good insulator of heat.

• Plastic is a good conductor of heat.

• Plastic is a good conductor of electricity.

• Plastic is a good insulator of electricity.

A student needs a conductor for a demonstration involving a battery and a lightbulb. Which material should the student select?

• rubber band

• cotton string

• paper clip

• glass rods

What is an ion?

• An atom with a negatively charged nucleus.

• An atom that no longer has the same number of electrons and protons.

• An atom with a neutral charge in its nucleus.

• An atom that does not have the same number of electrons and protons.

What kind of charge do protons have?

• negative

• positive

• neutral

Which part of the atom always has a positive charge?

• nucleus

• electron cloud

• the electron

• the neutron