Voici une vidéo qui permet de réviser pourquoi il existe une alternance jour/nuit ainsi que les saisons sur Terre.
https://www.turtlediary.com/video/rotation-and-revolution.html
Earth takes 365 days to complete one revolution around the Sun. The Earth also rotates at its own axis. Days and nights occur due to Earth’s rotation. We have seasons due to tilt in the Earth’s axis. Watch this video to find out how days, nights and different seasons occur on Earth.