Ontario Grade 9 Science Class Practice Exam

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What is a circuit diagram?

  1. A map of an electrical circuit

  2. A 3D model of a circuit

  3. A way of drawing an electric circuit using standard symbols

  4. A written description of how a circuit is assembled

The correct answer is: A way of drawing an electric circuit using standard symbols

A circuit diagram is a visual representation of an electrical circuit, using standard symbols to show different components and their connections. Option A is incorrect because a circuit diagram is not a literal map, but rather a simplified representation. Option B is incorrect because it is not a 3D model, but a 2D diagram. Option D is incorrect because it is not a written description, but a graphical representation. Therefore, the most accurate answer is C.

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