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

More Questions:

What year did Georges Bizet debut the opera "Carmen"?

What author's name means "two fathoms deep"?

What stretch of water lies between New Brunswick, Maine and Nova Scotia?

US city Milwaukee is located on the shores of what lake?

Which sea lies east of mainland Greece?

The word "serendipity" comes from Serendip, the Persian name for what island?

Burning potassium has what color flame?

What children's TV character lived in the Treasure House?

What game was the game show "Pantomime Quiz" based on?

In which movie did Tilda Swinton portray a witch?

Who changed her name to Rebecca Rolfe, after marrying John Rolfe?

In which decade was the Berlin Wall erected?

Who did Perseus turn into stone with Medusa's head?

Which Canadian singer performed the song "(Everything I Do) I Do It for You"?

By what name was Milwaukee's Pettit National Ice Center known as until 1991?