Whats Missing from this Picture

In this lesson, students view underwater images, showing fi sh and squid in the open ocean, and compare these images with images of animals on land. They discover that visible plants are conspicuously absent from the open ocean images. This discovery provides the opportunity to introduce and explore the role of plankton. Students add zooplankton and phytoplankton to their food chains and explore the role of a decomposer in a marine food web.

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abiotic environment, cycling matter, decomposers, food webs, flow of energy, photic zone, phytoplankton, plankton, primary producers, zooplankton