Part 1 of 5 · freeIntroduction
Many people think summer comes when Earth is closer to the Sun, and winter when it is farther away. That is wrong. And you can see it right away: when it is summer in France, it is winter in Australia.
The real explanation comes down to one thing: Earth's axis of rotation is tilted, leaning relative to the plane of its orbit around the Sun.
The rest is in the Sophia app.The remaining parts, the open-book quiz and the full glossary. Free to start; Premium unlocks everything.
- 2Earth leans
- 3More light, more heat
- 4What about near the equator?
- 5A planet with no tilt
Open-book quiz8 questions whose answers are in the text.
Glossary12 terms explained in a tap.
30 languagesThe same course, from French to Japanese.
