A brief introduction of the geosphere and the biosphere.

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.

Supervolcanoes can cause extreme destruction. 50,000 years ago in the Sierra Nevadas, a supervolcano erupted to create a 20 mile crater, known as the Long Valley Caldera.

Beakman explains aerosols, how they occur in nature, and how we use them in aerosol cans. He also explains how an aerosol can works. Then Beakman makes a DIY compressed air chamber with a 2 liter to show how an aerosol can works.

Scientists attempt to collect samples of molten lava on Mount Nyiragongo to help study the earth's core.