1. If the sun is a star, why does it appear so large in the sky?
2. Why do we see stars only at nighttime?
3. How does gravity hold planets and moons in space in their orbits?
4. What are tides, and how are they caused by the moon?
5. How are the earth and the sun different in size?
6. How does the tilt of the earth cause seasons? What are the longest and shortest days of the year?
7. How does the earth’s orbit around the sun cause one year?
8. What causes eclipses? What’s the difference between a solar and lunar eclipse?