Question 71 : The first hand glider was designed by...?
1. Leonardo DaVinci
2. The Wright brothers
3. Francis Rogallo
4. Galileo
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Question 72 : Who developed the idea of Crop Rotation?
1. Potato Peterson
2. Turnip Townsend
3. Cabbage Carlson
4. Swede Svenson
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Question 73 : What toy was invented by Joshua Lionel Cowen around 1900?
1. Raggedy Ann doll
2. Yo-yo
3. Electric train
4. Tinkertoys
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Question 74 : For what is Charles Babbage (1792-1871) remembered?
1. Computers
2. Telescopes
3. Radio-Telegraphy
4. Steam Boating
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Question 75 : When was barb wire patented?
1. 1874
2. 1840
3. 1895
4. 1900
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Question 76 : What Henry Bessemer invented?
1. Aluminum
2. Electroplating
3. Steel Converter
4. Steel rolling mill
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Question 77 : Who invented Electric Generator?
1. Sir Alexander Graham Bell
2. Michael Faraday
3. Alfred B. Nobel
4. Thomas Alva Edison
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Question 78 : What African-American inventor received 5 patents in the field of shoemaking?
1. Elijah McCoy
2. Jan Ernst Matzeliger
3. Ernest Just
4. Lewis Latimer
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Question 79 : In which decade were the first successful diode and triode vacuum tubes invented?
1. 1800s
2. 1880s
3. 1890s
4. 1900s
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Question 80 : This statesman, politican, scholar, inventor, and one of early presidents of USA invented the swivel chair, the spherical sundial, the moldboard plow, and the cipher wheel.
1. George Washington
2. Alexander Hamilton
3. John Adams
4. Thomas Jefferson
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