Inventors at Work

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Across
  1. 3. something that gives off a lot of light
  2. 8. a machine that plays recorded music or sound
  3. 9. takes in gas to make the other parts move
Down
  1. 1. small, specialized machines or electronic devices
  2. 2. engines that make a train go forward
  3. 4. to move slowly or noisily
  4. 5. a complete failure
  5. 6. to work in a rough or uneven way and made popping noises
  6. 7. legal documents stating that no one is allowed to make of sell your product