11.
Who invented Gunpowder?

12.
Until Victorian times, chocolate was thought of as a drink. When did the first chocolate bar appear?

13.
What now ubiquitous device was invented by Zenith engineer Eugene Polley in 1955?

14.
What Benjamin Franklin invented?

15.
This part-time race car driver invented the bucket seat in 1969. Who was he??

16.
What plaything was invented by Joe McVicker in 1956?

17.
Who was the first American female to patent her invention, a method of weaving straw with silk?

18.
Who invented Gramophone?

19.
What furniture item was invented by California furniture designer Charles Prior Hall in 1968?

20.
The Manhattan Project was started by President Roosevelt in 1942 to ensure that the U.S. beat the Germans in developing a nuclear bomb. Whom did Roosevelt appoint as scientific head the Manhattan Project?