Organisms and environments. The student knows that there are relationships, systems, and cycles within environments.
Organisms and Environments
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describe the flow of energy within a food web, including the roles of the Sun, producers, consumers, and decomposers;
predict the effects of changes in ecosystems caused by living organisms, including humans, such as the overpopulation of grazers or the building of highways; and
observe the way organisms live and survive in their ecosystem by interacting with the living and nonliving components;
identify fossils as evidence of past living organisms and the nature of the environments at the time using models.