3. What was Orville's contribution to the Wright brothers' duo?
(a) The vision.
(b) The mathematical skills.
(c) The enthusiasm.
(d) The mechanical skills.

4. How much did the Smithsonian institution give Langley to continue his work on planes?
(a) $40,000.
(b) $20,000.
(c) $50,000.
(d) $30,000.

5. What part of flight were the Wright brothers surprised was not paid attention to?
(a) Control and balance.
(b) Propulsion.
(c) Radio transmissions.
(d) Tracking.

6. How many bike shops did the brothers have by 1899?
(a) 5.
(b) 7.
(c) 6.
(d) 4.

7. How many years did Langley spend testing models before choosing a design?
(a) 13.
(b) 12.
(c) 10.
(d) 11.

8. How far did Amos Root travel to see the flying machine in Chapter 1?
(a) 50 miles.
(b) 400 miles.
(c) 200 miles.
(d) 300 miles.

9. What did Bishop Wright answer to the question about which of his sons was the most influential in their duo?
(a) That Wilbur was more influential.
(b) That they were equals.
(c) That Orville was more influential.
(d) That their sister Katherine was the real mastermind.

10. How did the pilot steer the plane?
(a) Sitting on the upper wing.
(b) Laying down on the upper wing.
(c) Sitting on the lower wing.
(d) Face down on the lower wing.

11. When did George Cayley build the first successful model gliders?
(a) 1804.
(b) 1812.
(c) 1807.
(d) 1805.

12. When did Wilbur write a letter to the Smithsonian asking for information about flight?
(a) 1896.
(b) 1898.
(c) 1897.
(d) 1899.

13. What education did the Wright brothers have?
(a) They were home schooled.
(b) Never went to school.
(c) Never finished high school.
(d) College.

14. What were Kitty Hawk's giant sand dunes known as?
(a) King Devil Hill.
(b) King Geaorge Hill.
(c) Kill Devil Hill.
(d) Kill of the Hill.

15. What was Orville's temperament?
(a) Hard headed.
(b) Soft spoken.
(c) Gregarious.
(d) Quiet.