A unit bundle for ecology, food chains and the flow of energy through the environment from the sun. Optimum for grades 3-5 science. The bundle contains all of the resources below. NGSS 5-LS2-1, NGSS 5-PS3-11. 40-slide PowerPoint on Ecology and Food Chains. Slides cover producers, consumers, ecosystems, community, population, decomposers, herbivores, carnivores, omnivores, food chains, food webs, scavengers.2. Food Chain Reading Comprehension with multiple choice question sheet and writing prompt