Who invented the steel plow?
Who is John Deere?
What did Samuel Morse invent?
What is the telegraph and morse code?
Which inventions enabled long distance communication?
What is the telephone and telegraph?
Who invented the telephone?
Who is Alexander Graham Bell?
What did Eli Whitney invent?
What is the Cotton Gin?
Which invention supplies water to settlers in the plains?
What is the windmill?
Who invented had the first successful motor operated flight?
Who are the Wright Brothers?
What did Guglielmo Marconi invent?
What is the radio?
Which invention enables businesses to play the commercials?
What is the radio?
Who invented crop rotation?
Who is George Washington Carver?
What did Thomas Edison invent?
What is the light bulb, motion picture camera, and phonograph?
Who's invention enabled farmers to grow more types of crops?
Who is George Washington Carver?
Who invented the windmill?
Who is Daniel Halladay?
What invention used peanuts and other plants?
What is crop rotation?
Which invention led to the need for an increase in slaves?
What is the cotton gin?