1. When and how is Earth Day celebrated?
2. Why is our planet called Earth?
3. How old are the Earth, the Solar System, and the Milky Way?
4. What are the dimensions and other facts about Earth?
5. What is the closest galaxy to the Milky Way, and how far away is it?
6. What is the polar vortex, and what happened in 2025?
7. How did the oceans emerge, and why are they important?
8. How did Earth’s atmosphere emerge?
