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? 1420 km 2440 km 5210 km
3. What is the escape velocity on the surface of Mercury? 4.3 km/s 8.1 km/s 11.2 km/s
4. How many natural satellites orbit planet Mercury? 3 1 None
5. What is the sidereal rotational period of Mercury? 59 days 88 days 176 days
6. What is the most abundant gas found on Mercury's atmosphere? Oxygen Nitrogen Hydrogen
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? One Two Four
