Across
- 2. Competition between the US and SU
- 4. Keeps us from flying away
- 5. Longest day of the year
- 10. Shortest day of the year
- 11. Rocky planets
Down
- 1. Caused by Earth's rotation
- 3. Fire disaster
- 4. Big Gas planets
- 6. When rock fall into Earth's atmosphere
- 7. Caused by the Moon's gravity and Sun and Earth rotation
- 8. Space lab
- 9. Caused by Earth's tilt