Across
- 4. small, specialized machines or electronic devices
- 5. has circular ends and straight sides. In an engine it takes in gas and makes parts move
- 6. a complete failure
- 9. giving off a lot of light
Down
- 1. when something works in a rough or uneven way and makes popping noises
- 2. a machine is moving slowly and noisily
- 3. engines that make a train go forward
- 7. legal documents for an invention so no one else is allowed to make or sell it
- 8. a machine that plays recorded music or sound