Part 1 of 5 · freeIntroduction
Picture a tiny factory inside every leaf. It takes three ordinary ingredients: sunlight, the water drawn up by the roots, and the CO₂ in the air. Out comes the sugar it needs to grow, plus the oxygen it releases.
This feat is called photosynthesis. Without it there would be no forests, no breathable oxygen, and almost no complex life on Earth.
The rest is in the Sophia app.The remaining parts, the open-book quiz and the full glossary. Free to start; Premium unlocks everything.
- 2Where it happens in the leaf
- 3Two stages: capture, then build
- 4When oxygen changed the planet
- 5A modest yield, a huge role
Open-book quiz9 questions whose answers are in the text.
Glossary7 terms explained in a tap.
30 languagesThe same course, from French to Japanese.
