Inventions and discoveries

Who is ___________ on the one hundred-dollar bill?

You Tube was ___________ for 1.65 billion dollars by Steve Chen.

Zippers were invented in 19 century. At first they were only used for ___________________making them faster to put on

In the United Kingdom, the _________ for a book lasts for 70 years after the author dies.

_________ is the greatest invention in history because it opened people up to a whole new world. It was made by Benjamin Franklin. Without it, the world would never be able to innovate. 

The first antibiotic penicillin was invented by accident, however medicine would have progressed without it

1. What was Dr. Spencer Silver originally trying to invent in 1968?


 2. Why was his adhesive first considered “useless”?

3. Who came up with the idea of using the adhesive on bookmarks?

4. In what year did Art Fry think of using the adhesive for bookmarks?

5. Why were the first Post-it® notes yellow?