Food chains show how energy passes from one organism to another as one organism eats another. A food web is a more complex network of interconnected food chains that shows how energy and nutrients circulate within an ecosystem through different trophic levels as many organisms obtain energy from multiple sources.

1. FOOD CHAIN and FOOD WEB

2. FOOD CHAIN The energy from an organism is passed from one organism to another ENERGY ENERGY

3. The food web can be viewed not only as a network of chains but also as a series of trophic (nutritional) levels.

4. FOOD WEB set of interconnected food chains by which energy and materials circulate within an ecosystem.