What percentage of air is composed of oxygen?

More Questions:

What's the opposite of the Orient?

What book was the film "Three Days Of The Condor" based on?

What's the subject of the 1969 memoir "Thirteen Days"?

Brookline, Cambridge and Quincy are suburbs of what US city?

Which city is known as Motown?

In the first Punic War, Rome and Carthage fought over possession of what Mediterranean island?

What scale measures earthquakes?

What celestial body orbits the Earth?

Filbert is an alternative name for which nut?

What does a meteorologist study?

Five out of six of the Village People have got what?

What song won the grammy for "song of the year" in 1977?

Who played the blind character in the movie "The Miracle Worker"?

Which year was the film "Shanghai Surprise", starring Madonna and Sean Penn, released in?

Which female trio won 5 Grammy Awards in 2007?