Part 1 of 5 · freeIntroduction
A volcano is not just a mountain that spits fire. It is an opening in the Earth's outer shell. Through it rises magma: a mix of molten rock and gas under high pressure. Once out in the open air, that magma becomes lava.
To understand an eruption, you have to look below the surface: the planet's inner heat, the movement of the plates, and the way gas drives the pressure up, a little like a bottle of soda that has been shaken.
The rest is in the Sophia app.The remaining parts, the open-book quiz and the full glossary. Free to start; Premium unlocks everything.
- 2Under our feet, nothing stands still
- 3From magma to eruption
- 4Runny or explosive?
- 5Danger, fertile soil, life in the deep
Open-book quiz8 questions whose answers are in the text.
Glossary7 terms explained in a tap.
30 languagesThe same course, from French to Japanese.
