premise: plankton live in bodies of water sent2: in the food chain process some types of plankton have the role of producer sent3: a factory dumped mercury into a bay sent4: microorganisms change mercury in a bay into a form that plankton can use sent5: an element is a kind of material sent6: a bay is a kind of body of water sent7: mercury is a kind of element sent8: producers pass materials they use through the food chain.
hypothesis: mercury is passed through the food chain