[/caption] Ready… 1. How many planets are in the Solar System? a. 8 b. 9 c. 10 d. 12 2. How old is the Solar System? a. 65 million years b. 1.2 billion years c. 4.6 billion years d. 13.7 billion years 3. What is the biggest moon in the Solar System? a. The Moon … Continue reading "Solar System Quiz"