In this growing bundle of lessons on ecology, students will learn to classify organisms into their roles in an ecosystem, identify relationships between organisms, label a food web and food chain, identify trophic levels, describe an organism's niche, identify biomes, describe ecological cycles, and discuss current ecological concerns. Vocabulary terms in this unit include ecology, niche, consumer, producer, heterotroph, autotroph, trophic feeding, carnivore, herbivore, omnivore, detritivore,