Learning Paths
Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Chapter 8
Ecosystems and Food Chains, Pollution and Conservation
Grass feeds the deer, the deer feeds the tiger, and fungi return them all to the soil. Living things and their surroundings form ecosystems, where energy flows and materials go round. In this chapter you follow food chains and webs, see why only a tenth of the energy passes up each level, and learn how harmful chemicals build up along a chain. Then you look at our own impact: the ozone layer and the waste we throw away. Python follows the energy up a food chain for you.
2 courses
