1. The Wright brothers are credited with inventing what?

2. Who was the first woman to fly solo across the Atlantic Ocean?

3. What year did World War I begin?

4. What was the original primary use for the first wheels invented in Mesopotamia?

5. Which Han Dynasty official is traditionally credited with inventing the paper-making process?

6. What key component did James Watt add to the steam engine to make it efficient enough for widespread industrial use?

7. Who was the assistant Alexander Graham Bell spoke to in the first successful telephone call?

8. What was the name of the first successful powered aircraft flown by the Wright brothers?

9. What component, originally used in WWII radar systems, is the heart of a microwave oven?

10. Which software company was founded specifically to write a programming language for the Altair 8800?

11. What type of storage medium did the first digital camera use to save images?

12. What material is commonly used in gas mask filters to trap and neutralize toxic gases?

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

14. What was the name of the first commercially successful electric washing machine?

15. Approximately how long does it take for a modern airbag to inflate during a crash?

16. Which gas was used in the first successful public demonstration of surgical anesthesia in 1846?

17. What large rotating device on the side or back of a steamboat propels it forward?

18. Steamboats were especially important in the 1800s because they improved transportation of what?

19. Which of the following best describes a sidewheeler steamboat?

20. Today, most operating steamboats in the United States are used primarily for what purpose?