A linear sequence of organisms through which nutrients and energy pass as one organism eats another. In a food chain, each organism occupies a different trophic level.
Food Webs
An interconnection of foods chains within an ecosystem.
Food Order and Energy Flow
Trophic Levels: Click on the link to explore the trophic levels of a energy pyramid. What is the difference between a food chain and a pyramid of numbers?
Matter Cycles
Water Cycle
Carbon Cycle
Do you know what carbon dioxide is?
The Carbon Cycle
Test Yourself by clicking on the carbon cycle diagram and playing the carbon cycle game!