A woodland tree food web Student activity Play

Biogeochemical cycle in the food chain Slideshow Play

Chemical energy – the energy of chemical bonds Student activity Play

Ecological pyramids Student activity Play

Energy flow and food chains Student activity Play

Energy flow through food chains Animation Play

Energy in a food chain Student activity Play

Energy loss Slideshow Play

Energy losses in a food chain Slideshow Play

Examples of ecological pyramids Slideshow Play

Flow of energy through the components of an ecosystem Simulation Play

Food chain Student activity Play

Food chains Whiteboard presentation Play

Food chains in nature Slideshow Play

Food web terminology Student activity Play

Food webs Animation Play

Food webs Student activity Play

Functioning of an ecosystem Whiteboard exercise Play

Functioning of an ecosystem Student activity Play

How a pyramid of numbers works Animation Play

Lymphocytes; the producers of antibodies and killers of pathogenic factors Student activity Play

Lymphocytes; the producers of antibodies and killers of pathogenic factors Animation Play

Pesticides in the food chain Slideshow Play

Phosphorus circulation in the environment Illustration Play

Phosphorus cycle Student activity Play