Ontario Grade 9 Science Class Practice Exam

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Prepare for the Ontario Grade 9 Science Class Exam. Engage with interactive questions and detailed explanations to solidify your knowledge. Enhance your understanding of essential science concepts and boost your confidence for the test!

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 is an Ecosystem?

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

The correct answer is: A biological community of interacting organisms and their physical environment.

An ecosystem is a complex system that includes living organisms and their non-living environment. It is an interconnected community made up of plants, animals, and microorganisms that interact with each other and their physical surroundings, such as water, air, and soil. Option A accurately describes the definition of an ecosystem, while the other options do not fully capture the concept. Option B describes the definition of the universe, not specifically an ecosystem. Option C describes the definition of sunspots, not an ecosystem. And option D describes the field of ecology, which is the study of ecosystems, but is not the definition of an ecosystem itself. Therefore, A is the correct answer.