Tornadoes are columns of air that generally come into contact with what kind of clouds?

More Questions:

What team won the first Super Bowl?

Which one of tennis" Grand Slam tournaments did Pete Sampras never win?

How many holes are there in a standard Ritz cracker?

What is the colour of mourning in Turkey?

What is the sixth commandment?

Which country was selected as a host of the 1916 Olympic Games, but didn't actually host them?

What book was written as a sequel to "The Adventures of Tom Sawyer"?

In what Edgar Allan Poe story does an old man's oddly clouded eye lead to murder?

What do most tourists call the Vieux Carre?

What is the common name for the fruit known as "Citrus grandis"?

What kind of dental specialist performs root canals?

In which US state does the movie "Night of the Living Dead" take place?

Which actor was dubbed the "Muscles from Brussels"?

New York's Wall Street was named when a wall was built there for what purpose?

Which invention resulted in the Printing Revolution across Europe?