Here are the answers to the crossword puzzle:
Across
1. George Washington Carver invented 300 ways to use peanuts.
3. Many famous inventions were first created by mistake.
6. In 1903 the Wright Brothers made their first flight in Kitty Hawk, NC.
7. The Wright Brothers invented the first motor-powered airplane.
8. Submarines were invented about 500 years ago.
9. Igor Sikorsky invented the helicopter.
10. Samuel Morse invented Morse Code.
Down
1. Edwin Land invented the Polaroid Camera.
2. Gutenberg invented the printing press.
4. George Eastman improved the camera in 1888.
5. Newton discovered three laws of motion.