Ontario Grade 9 Science Class Practice Exam

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What does an energy pyramid show?

  1. The specific role of a species within an ecosystem

  2. The amount of energy that moves from one feeding level to another in a food web

  3. A system of interlocking and interdependent food chains.

  4. Series of steps in an ecosystem in which organisms transfer energy by eating and being eaten

The correct answer is: The amount of energy that moves from one feeding level to another in a food web

An energy pyramid shows the flow of energy within an ecosystem, from primary producers at the bottom to higher trophic levels. It represents the amount of energy that is transferred from one feeding level to another, with each level typically receiving 10% of the energy from the level below. Option A is incorrect because it describes the role of a species, not the flow of energy. Option C is incorrect because it describes a food web, not specifically the flow of energy. Option D is incorrect because it describes a food chain, which is a linear representation of energy transfer, rather than the pyramid shape used in energy pyramids.

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