geography: In which continent would you find the Volga river ?

Questions

Trivia : Chemically pure gold contains how many karats?

Trivia : What is the surface area inside the average adult human lung (in square feet only)?

Trivia : On which Beatles album does the hit "Ticket to Ride" appear?

Trivia : Who wrote the stories on which Disney's, "Jungle book" is based"?

Trivia : What is the significance of the temperature in the title of the 1960's science fiction film "Fahrenheit 451?