What a pond, a forest and a field have in common. You meet the living and the non-living parts of an ecosystem and the layers of a forest. Then you follow the grazing and the detritus food chains, join them into a food web, and find the trophic level of each organism.
3 lessons, about 1 h 20 min3 simulations10 problems3 practice questionsPython in every lesson
Created by StemPy LabAn ecosystem is a place where living things and non-living things work together as one unit. This lesson names the living parts (producers, consumers and decomposers) and the non-living parts, uses a pond as the model, and shows how the species of a forest sit in layers.
Food moves through an ecosystem along food chains. This lesson separates the grazing food chain from the detritus food chain. It shows which one carries more energy on land and in water. Then it joins the chains into a food web that a program can count.
Every organism of a food chain sits at a trophic level. This lesson names the levels and shows how one species can sit on more than one level. It explains why a chain is short. Then it defines the standing crop and says why dry mass is the fair way to measure it.
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