The dam Plunder built is broken and flooding threatens the villagers. The Planeteers summon Captain Planet, who rushes to the rescue. Captain Planet heats himself up and evaporates the flooding waters into rain clouds, which will rain and restore the river in time.

Mr. Wizard demonstrates the difference between steam and water vapor to Billy using a teapot and flames. He explains that steam is the gas form of water and that we mistakenly refer to water vapor as steam in everyday conversation.

The class goes to Water Land and learns about how water changes when it is exposed to different amounts of heat. When water is heated by the sun, it evaporates. When it is cooled, it condenses.

Bill Nye explains what volcanoes are, how they're formed, and what causes an eruption. He then explains the impact of volcanoes on the earth's geography.

Scrat places a nut on the ground, causing the Earth to split in half. He travels down the layers of the Earth and chases the nut on the Earth's core. This clip comically shows how the different continents and many of Earth's iconic structures formed.