Across
- 2. This is the hottest planet in the Solar System even though it not the closest to the Sun.
- 4. This gas makes up most of Jupiter's mass.
- 5. Phobos and Deimos are irregularly shaped moons of ____.
- 9. The inner planets are also known as ____ planets because they are primarily made of rocks and silicate.
- 10. The Solar System is almost 4.6 ____ years old.
Down
- 1. This planet with rings has the most number of moons in the Solar System.
- 3. ____ rotates on its side due to its 98° axis of rotation.
- 6. The ____ belt is located between Mars and Jupiter.
- 7. Neptune and Uranus are blue because of the ____ in their atmosphere.
- 8. How many planets are there in the Solar System?