1. What is the primary function of an Archimedes' screw?

2. What was the first major book printed using Gutenberg's movable type?

3. What are the three primary chemical components of gunpowder?

4. What was the first message ever sent by Samuel Morse via telegraph in 1844?

5. What substance is blown through molten iron in the Bessemer process to remove impurities?

6. What manufacturing innovation did Henry Ford introduce to make the Model T affordable?

7. At which research organization did Tim Berners-Lee invent the World Wide Web?

8. Who invented the first practical automatic dishwasher in 1886?

9. Which element's atoms are most commonly used in the primary standard for atomic clocks?

10. Which of these devices was made possible primarily by the high energy density of the Lithium-Ion battery?

11. What are the four 'strokes' in the internal combustion engine cycle named after Nikolaus Otto?

12. Why was Bakelite considered the first 'true' plastic?

13. What was the first commercial product made using nylon?

14. Why is the steam turbine more efficient than the traditional steam engine used in locomotives?

15. What improvement made 'safety matches' safer than early friction matches?

16. What is the primary function of the small tail rotor on a standard helicopter?

17. What does an electron microscope use instead of light to illuminate a specimen?

18. Unlike X-rays, what does an MRI use to create images of the body?

19. Why is a chip card more secure than a magnetic stripe card?

20. What does a sailor measure with a sextant to find their latitude?