Ontario Grade 9 Science Class Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

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!

Practice this question and more.

What does astronomy study?

The planet Earth
The universe
Only the solar system
The ocean depths

The correct answer is: The universe

Astronomy is the study of celestial objects and phenomena that exist outside of Earth's atmosphere, including planets, stars, galaxies, and the universe as a whole. While Earth is a component of the universe, it is not the sole focus of astronomy. Option A is incorrect because Earth is not the only object studied in astronomy. Option C is incorrect because astronomy extends beyond just the solar system. Option D is incorrect because it pertains to the study of Earth's oceans, which is not related to astronomy. Thus, option B is the most accurate answer.