Why do we coat wires with plastic or rubber?

because those materials are good insulators

because those materials look nicer than copper wire

What is static electricity caused by?

an imbalance of positive and negative charges

a balance of positive and negative charges

a balance of various positive charges

When you attach a battery to an electric light bulb, what process makes the bulb light up?

electrons flowing through the circuit

protons flowing from the battery into the bulb

chemicals moving from the battery through the wire

Grade 9 Electricity Quiz Questions and Answers

Physics

NGSS

Reviewed by Matt Balanda

Matt Balanda, BS (Aerospace Engineering) |

Science Teacher

Review Board Member

Matt Balanda, a Calvary Chapel Christian School leader with a Bachelor's in Aerospace Engineering and Mathematics, transitioned from Aerospace Engineering to Education with a Master's from California Baptist University. As the High School Vice-Principal and Physics teacher, he nurtures students' love of learning and faith, creating an enriching and transformational educational experience.

, BS (Aerospace Engineering)

By Dustysquirrel

Dustysquirrel

Community Contributor

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| Attempts: 33,672 | Questions: 10 | Updated: Jun 17, 2025