useless trivia: What Word Means: Gapes?

Questions

[pot luck] in which country was the game trivial pursuit invented?

[science and technology] what is the lightest known gas?

[science and technology] what is the unit used to measure supersonic speed?

[science and technology] what do the initials NASA of the us government agency for space flight represent?

[science and technology] what is a chuckwalla?