Science of life

Explains that scientists use an organizing system called taxonomy to study animals, and introduces phyla, chordates, and more.

Explains the discovery of cells, what cells are, the kinds of cells, cell reproduction, and more.

Explains how the sun's energy travels through plants and animals along a path called the food chain, discussing producers and consumers, how nothing is wasted, how scientists study food chains, and more.

Introduces ecosystems, food webs, why biodiversity is important, and how ecosystems are being threatened.