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 constitutes the solar system?

The sun, planets, and all other objects that revolve around the sun.
A device used to measure electric current.
A large cloud of gas and dust.
The backward movement of planets.

The correct answer is: The sun, planets, and all other objects that revolve around the sun.

The solar system is made up of the sun, planets, and other objects that are held in orbit by the sun's gravitational pull. Option B is incorrect as a device used to measure electric current is called an ammeter. Option C is incorrect as a large cloud of gas and dust is part of a galaxy, not the solar system. Option D is incorrect as the backward movement of planets is called retrograde motion and is not a defining characteristic of the solar system.