Mercury Facts Quiz

Which planet is closest to the Sun?

• Venus

• Earth

• Mercury

• Mars

How many days does Mercury have in a year?

• 365

• 100

• 225

• 88

What is the equatorial diameter of Mercury?

• 4,880 km

• 12,756 km

• 6,371 km

• 10,000 km

Which planet is the hottest in the solar system?

• Mars

• Earth

• Venus

• Mercury

How many spacecraft have visited Mercury?

• One

• Two

• Three

• Four