What is glass mainly made up of?

More Questions:

What is water that is safe to drink referred to as?

What original literary work was the movie "The Innocents" based on?

Who wrote :The Tale of Peter Rabbit"?

What Broadway team collaborated on "Flora the Red Menace" before writing "Cabaret" and "Chicago"?

Which city is the Arch of Hadrian located in?

What two states share a border with Florida?

Sleeping Bear Dunes National Park is located along the shores of what lake?

What is the term for the physical disintegration of a nuclear reactor's core?

What vitamin group is mostly required for blood coagulation?

On which planet did the spacecraft Venus 8 land in 1972?

What made-up expletive is "Battlestar Galactica's" dirty word of choice?

What do the letters B.B. stand for in B.B. King?

How tall is the Academy Award statue?

Which band recorded the live album titled "Strangers in the Night"?

Actress Kathy Kinney is best known for portraying what sitcom character for nine seasons?