Across
- 5. legal documents to protect inventions from being stolen
- 6. in a car engine, take in gas to make other parts move
- 7. when something works in a rough or uneven way and makes popping noises
- 9. a complete failure
- 10. small, specialized machines or electronic devices
Down
- 1. the engines that make a train go forward
- 2. when a machine moves slowly and noisily
- 3. something that gives off light
- 4. 3d shape with circular ends and straight sides
- 8. a machine that plays recorded music or sounds