General Biology II · Module 16 · Ecosystems, biomes and conservation

Ecosystems Walkthrough

Watch sunlight heat the planet unevenly, air rise and rain fall, energy drain away up a food chain while atoms of carbon, nitrogen and phosphorus go round and round, and small populations spiral toward extinction. Go at your own pace. Nothing here is graded.

Speed

Think of it like this

Quick check

Wrong answers are fine here. Read why, then try again.

Dr. Akash Garg · General Biology II Study Tools · Drawings are simplified and not to scale. CC BY-NC-SA 4.0
Use the left and right arrow keys to move between steps. Air, water and atoms move far faster than real life so you can follow them, and numbers are rounded teaching values unless a step says otherwise. Practise next in the Ecosystems Lab.