II Fill in the Blanks:
1. Earth is the third planet from the sun.
2. Earth is the only planet to support life.
3. Approximately 71% of Earth's surface is covered with water.
4. The sun is considered a star.
5. Earth is the fifth largest planet in our solar system.
6. The Copernican model of the solar system.
7. The development of modern astronomy.
8. Scientific advancements in understanding celestial bodies.
9. The theory of gravity.
10. The Sun and eight planets formed the solar system.
11. Circumnavigation by explorers like Ferdinand Magellan proved that the Earth was not flat but round.