Ontario Grade 9 Science Class Practice Exam

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Master Grade 9 Science with our comprehensive practice exam. Test your knowledge, identify weak areas, and boost your confidence for academic success.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is an electric circuit?

A break in which electrons can flow
A continuous path in which electrons can flow
A one-way path for electron flow
A path only for alternating current

The correct answer is: A continuous path in which electrons can flow

An electric circuit is a complete path through which an electric current can flow. Choice A is incorrect because a circuit is not a break, but rather a connected pathway for electrons to follow. Choice C is incorrect because a circuit can allow electrons to flow in both directions, not just one. Choice D is incorrect because a circuit can carry both alternating current and direct current. Therefore, the correct answer is B.