Science topic

Grade 7 ecosystems and food webs

Producers, consumers and decomposers, and how a change ripples through a food web. Here is what we have for Grade 7.

Lessons

Ecosystems and Biomes: Who Depends on Whom

Real wolf and moose counts from Isle Royale, a sixteen-card sort of competitors, predators, parasites and partners, six real climate graphs to match to their biomes, and a sea wall against a salt marsh. Four print-and-go lessons on populations, interactions, biomes and the services ecosystems give us.

Free tools

Predator and Prey

Run a simulated meadow of hares and lynx. Change birth and hunting rates and watch the two populations rise and fall on a live graph.

Food Web Builder

Build a food web for a forest, pond or ocean by drawing arrows from food to eater. Then remove one species and see which others are affected.

Ecosystems and food webs in other grades:Grade 3 Grade 5 Grade 6 Grade 8 All grades