Inventors and Inventions Crossword

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Across
  1. 5. Henry Ford thought of a faster easy to build cars using an ____ line.
  2. 7. A ___ could record and play sound.
  3. 8. Alexander Graham Bell invented the ___.
  4. 10. The space and science agency of the U.S. government is called ____.
Down
  1. 1. Alexander Bell's assistant was Mr. _____
  2. 2. cars This invention made it much easier for people to travel by train. (2 words)
  3. 3. The ___ brothers built the an airplane.
  4. 4. Garrett Morgan invented a ____ mask.
  5. 6. Mr. __ invented the traffic light.
  6. 9. A famous inventor was Thomas_____.