Across
- 3. The rocky planets are made of chunks of rock and ___
- 6. Objects captured by planets and now orbit around them
- 7. what are the building blocks of planets called?
- 9. Which object was the first to form in the Solar System?
- 10. perhaps water was brought to the Earth by___
- 11. moving closer and further from the Sun - we call this
- 15. Which planet was knocked onto its side by an impact?
Down
- 1. Our Solar system is thought to be about 4.5___ years ago.
- 2. which planet do scientists think formed first?
- 4. What do we call planets which orbit other stars?
- 5. Which planet spins in the opposite direction to the others?
- 8. rocky leftover pieces of rock in the Solar System
- 12. Which force is responsible for formation of the Sun?
- 13. there are two ice giant planets. Uranus and?
- 14. ___ is smaller in size than expected due to Jupiter?