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4th Grading Cycle 7th Grade Science (Study Guide) 7.5 C- Diagram the flow of energy through living systems, including food chains, food webs and energy pyramids. New Information: ● ● ● ● Energy Pyramid - a diagram that shows the decreasing amount of available energy as it flows from one trophic level to the next moving Producers are at the bottom of the Energy Pyramid the four levels of the Energy Pyramid are: Producers (bottom), Primary Consumers, Secondary Consumers, and Tertiary Consumers (top). 10% of the energy is transferred from one level to the next Old Information Food Chains Food Webs Vocabulary: Food chains, food webs, energy pyramids, trophic levels, producers, consumers (primary, secondary, tertiary), herbivores, omnivores, carnivores, decomposers, scavengers, 10% rule 4th Grading Cycle 7th Grade Science (Study Guide) 7.10 B- Describe how biodiversity contributes to the sustainability of an ecosystem. New Information: ● The more biodiversity within an ecosystem, the more sustainable the ecosystem becomes. Biodiversity: is variety of life within a particular an Sustainability: is an ability to maintain (balanced) a healthy ecosystem, and survivability of species within it. ecosystem. Vocabulary: ecosystem, biome, niche, sustainability, biodiversity, population, increase, decrease, greater, chain, ourselves, extinct, stress. Old Information: ● Compare and give examples of how organisms depend on each other and their environments. ● Predict the effects of changes in ecosystems caused by living organisms. 7.11 A- Examine organisms or their structures such as insects and leaves and use a dichotomous key for identification. New information: ● ● ● Describe the usefulness of a dichotomous key. Using different dichotomous keys. dichotomous keys are like a flowchart or questionnaire that helps the user identify an organism by going through a series of options directing the user to the correct organism. Flow/Bracket Chart Question/Answer “Traditional” Vocabulary: dichotomous key, physical characteristics, morphology Old Information: Sorting plants and animals into groups based on physical characteristics sorting and classifying living and nonliving things ● ● Traits help us identify different organisms.. Biologists use the trait to classify organisms into three major groups called domains.