Across
- 1. the introduction of something new
- 5. an important discovery which helps progress to be made
- 7. to figure out the size or amount of something
- 11. a strong emotion usually from stress
- 13. to depend on or trust
- 15. a small piece of equipment that does a specific job
- 16. expensive
- 19. unlikely to happen
- 20. invisible gas that we breathe
- 21. a useful new device or machine
Down
- 1. not able to occur, exist or be done
- 2. a house and its occupants regarded as a unit
- 3. a special function that a piece of equipment has
- 4. a high-pitched sound made my your mouth
- 6. a device that works by itself without human assistance
- 8. a piece of equipment which can be transported
- 9. a person walking rather than travelling in a vehicle
- 10. likely to happen
- 12. something that is rubbish or needs to be thrown away
- 14. make (something) on a large scale using machinery
- 17. something which is no longer in use
- 18. a small piece (usually wheel) that helps keep something working