useless trivia: What Word Means: An Ancient Ruined Mayan City In Mexico?

Questions

Which physical property allows a needle to float on water?

Which one word describes all of the following, a type of sandpiper, an Elizabethan collar and to trump at cards?

Which common substance is obtained by boiling down horns, hides and hoofs?

Who won best actor Oscar in 1989 for My left Foot?

If your face was rugose, what would it be?