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AP Environmental Science 1.9: Trophic Levels

Practice AP Environmental Science questions on trophic levels, producers, consumers, food-chain arrows, energy flow, and matter flow.

Syllabus
Effective Fall 2025
Course
AP Environmental Science

Covered syllabus points

ENG-1.B—Explain how energy flows and matter cycles through trophic levels

1.9 Trophic Levels question 1

[Maximum number: 1]

An Arctic food web includes the following organisms.

Figure for Question 1.9 Trophic Levels question 1 — AP Environmental Science

Note: Figures not drawn to scale.

Other than showing which organisms are consumed by other organisms, describe what is indicated by the direction of the arrows in the diagram.

As the amount of sea ice has decreased, larger expanses of the Arctic Ocean are now completely free of sea ice for several weeks each summer. Ringed seals, the preferred prey of polar bears, come to holes in the sea ice to breathe.

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