What name is given to the crater at the top of a volcano caused by its collapse?

More Questions:

What nickname for potatoes comes from the name of the tool used to dig them up?

A government in which power is restricted to a few is called a what?

In what novel would you find the character known as the Artful Dodger?

What is the largest living fish?

Whose "Difference Engine" is often described as the first computer?

Chondromalacia is the medical term for what?

What zone of radiation was first detected by "Explorer', the first US satellite?

What movie's first batch of soap is made out of fat from liposuction clinics?

What two neighboring beaches in Rio de Janeiro each inspired hit songs?

What musician plays pinball against Roger Daltrey in the 1975 film version of The Who's "Tommy"?

In what year did Mother Teresa die?

Which US president lived in Shadow Lawn?

What meteorological significance is traditionally attached to cows lying down?

The song "Son of My Father" is credited as being the first number 1 UK hit to feature which instument?

Perth is the capital of which Australian state?