1. What is the third largest object in the solar system?
2. Europa, Ganymede, Callisto and Io are moons of which planet?
3. Which is the largest, Earth or Mars?
4. Which one of Saturns moons is larger than the planet Mercury?
5. Jupiter consists primarily of which two elements?
 Hydrogen and Helium
6. Which planet is closest to the sun?
7. Which planet during its orbit comes closest to Earth at 41 million miles away?
8. Which planet is the eighth planet from the sun with a mass 17 times that of earth?
9. In which century was the planet Jupiter discovered?
10. Which planet in the solar system is the closest in size to the Earth?