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

More Questions:

What type of gemstone was historically worn with the belief that it would prevent the wearer from becoming drunk?

'The Cardinal of the Kremlin" is the sequel to what 1984 Tom Clancy novel?

In what country is the town of Liege?

Vienna is the capital of which European country?

Which branch of Science is concerned with the study of matter and energy?

How many land miles are there in a league?

Which element is combined with Iron to create Steel?

What popular singer had a chimpanzee name Scatter?

In the movie It's a Wonderful Life, what did George dream of becoming?

What is Biff's last name in the "Back to the Future" movies?

Who fretted over exponential population growth in his "An Essay on the Principles of Population"?

Which campaign was awarded the Nobel Peace Prize in 2017 for its work to promote the full implementation of the Treaty on Prohibition of Nuclear Weapons?

Which European city is regarded as the watch making capital of the world?

Which country borders Macedonia to the east?

On which of the Canary Island would you find the holiday destination of Corralejo?