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!

Practice this question and more.

What constitutes the universe?

A stream of electrically charged particles produced by the sun's corona
Space and all the matter and energy in it
A biological community of interacting organisms and their physical environment.
Scientific study of interactions among organisms and between organisms and their environment

The correct answer is: Space and all the matter and energy in it

The universe is defined as the vast expanse of space that contains all matter and energy. This includes planets, stars, galaxies, and all the space between objects. Option A is incorrect as it describes a stream of particles rather than the entirety of the universe. Option C and D are incorrect as they describe a biological community and scientific study, which are more related to the study of life on Earth rather than the vast expanse of the universe.