Planets

5. Mars has ____ moons.
6. The largest and oldest planet
8. The ___ belt is found outside Neptune's orbit and contains asteroids, ice, comets, and dwarf planets.
9. The second largest and least dense planet
11. Uranus is called the ____ planet because its rotation is parallel to its orbit.
13. The largest moon on Jupiter is called ___.
15. The highest mountain in the solar system is found on ____.
17. Mercury gets very hot during the day and very cold at night because is does not have an ____.
18. The clouds on Venus are made of _____ acid.

1. Mars looks red because its rocks, soil, and dust contain a lot of ___.
2. ___ was discovered using math before it was discovered with a telescope.
3. The four outer planets are called ____ planets.
4. The four inner planets are called ____ planets because they have a solid surface made of rock and metal.
7. Jupiter has a giant ____ that is really a storm that has lasted for centuries.
10. Dwarf planet found in the asteroid belt.
12. The clouds on Jupiter are made of ammonia and water.
14. Uranus and Neptune are the ____ giants.
16. The hottest planet in the solar system.