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

More Questions:

The adjective "callipygian" refers to someone who has a beautiful what?

How many strings are there on a standard violin?

The Bunya Pine tree is native to which country?

Where did former NFL star Joe Montana play college football?

Until 1790, what was known as Jenkins Hill?

What desert gets its name from the Arabic word meaning "desert"?

European bees were bred with bees from what other continent to create "killer" bees?

On the periodic table, an element’s atomic number represents the number of what in it's atom?

In the TV show "The Simpsons', which breed of dog is Santa's Little Helper?

What two American leading men are related to director Francis Ford Coppola?

'Next" and "Paycheck" are films based on stories by which Science-fiction author?

What was frontierswoman Martha Burke better known as?

What Christian sect did a Huguenot belong to?

What rival faction split from the Bolsheviks at the Communist Party Congress of 1903?

Who invented writing?