The surface of the dwarf planet Pluto is made largely of what type of frozen gas?

More Questions:

What is the "NPC" abbreviation short for to a video gamer?

What original literary work was the movie "Nosferatu" based on?

According to the poem, how many spectators saw Mighty Casey strike out?

What was the first part of J.R.R. Tolkien's Lord of the Rings trilogy?

What two states border Lake Champlain?

What is the only mammal naturally capable of true and sustained flight?

What is the Gulf Stream?

What part of the licorice plant gives the candy its distinctive flavor?

Musical duo Kaoma introduced the world to which dance in 1989?

What is Mr. Freeze's given name?

Who played Elliot Ness in the 1987 movie "The Untouchables"?

Which actor had to swim for his life whilst filming The Beach in 1999?

What year saw the completion of the Empire State Building?

Which ocean does the African country, Burundi, has access to?

How many countries border the Black Sea?