Follows a drop of water as it cycles from droplet to vapor and back to water and describes its journeys in between.

Describes how electrical energy is generated in power stations and how it travels through pylons, power cables, and wires into people's homes.

Describes how the bones of a dinosaur became fossilized, were discovered by a paleontologist, and were ultimately displayed in a museum.

Learn how weather and water wear away rocks.

Describes the physical and emotional changes that occur in adolescents during puberty and discusses topics including sexual activity, pregnancy, and sexually transmitted diseases.