Beakman explains what metals are and how they occur naturally. He then pretends to be Andrew Carnegie to explain how he figured out how to make steel. Beakman explains that steel is a lot stronger than iron so this allowed us to create buildings, strong machines, etc.

Hank explains the properties of Carbon and its flexible bonding criteria, which allows it to bond with essentially any other element. He also mentions that Carbon is the core atom of living structures and explains why this is the case.

Lowly Worm and Huckle Cat wonder about what kinds of gems and metals could be buried under Busytown. They think about the mining process that brings us things like jewels, iron, and more!

A group of participants attempts to understand the purpose of the machine and the magnets given to them. After they put the magnets in the machine and turn it on, they notice that the magnets start to form complex structures on their own. The magnets symbolize atoms, and the experience suggests that compounds can form on their own over time, given a constant input of energy.

Suika and Chrome find an extremely rare ore–scheelite. Senku explains that when processed, it can be used as tungsten which is used in modern lightbulb filaments.