1. What is the average distance of Mercury, from the Sun?
0.38 astronomical units
0.52 astronomical units
0.86 astronomical units
2. What is the equatorial radius of Mercury?
3. What is the escape velocity on the surface of Mercury?
4. How many natural satellites orbit planet Mercury?
5. What is the sidereal rotational period of Mercury?
6. What is the most abundant gas found on Mercury's atmosphere?
7. How long does Mercury take to complete one orbit?
88 Earth days
102 Earth days
196 Earth days
8. Compared to the Earth, planet Mercury has a mass of,
1/4 Earth mass
1/10 Earth mass
1/20 Earth mass
9. The correct statement about the density of planet Mercury,
It is the densest planet in the solar system
It is the second densest planet in the solar system
It is the third densest planet in the solar system
10. How many spacecrafts have visited Mercury?