Noah built a UFO
Nope.
A UFO is an object which flies and you cannot identify it (ie. you don't know what it is). I think it is safe to say that if you are building something, you know what it is, and hence, is not a UFO. So you can see that it is practically impossible to build a UFO. Note :- UFO stands for Unidentified Flying Object.
As much as it costs to build a flying object that flies either high enough or fast enoughed that they cannot be identified.
a UFO See http://grammar.ccc.commnet.edu/grammar/abbreviations.htm (all the way to the bottom) for help determining when to use a or an before an abbreviation.
They usually see UFO's at a UFO sighting
Ufo's do exist because a Ufo is a thing in the sky that you can not explain.
movies that have UFO's in them i guess
It is unknown what is inside of a UFO.
The 'F' in UFO stands for "Flying". UFO is an acronym for Unidentified Flying Object.
You put the rod in the UFO and
Air +metal= ufo