Across
- 4. a principle or standard by which something may be judged or decided
- 5. a thermoplastic of high density
- 7. an electromotive force
- 9. a stable subatomic particle with a charge of negative electricity
- 10. a tool or machine with a rotating cutting tip or reciprocating hammer or chisel, used for making holes
- 11. a rough or unfinished drawing
- 13. a tool used to remove fine amounts of material from a workplace
- 16. the natural purpose (of something) or the duty (of a person)
- 17. a hand tool used in metal work to mark lines on work pieces
- 18. close-fitting glasses with side shields, for protecting the eyes from glare, dust, water, etc
- 22. a closed loop which electrons can travel in
- 23. the negatively charged electrode by which electrons enter an electrical device
- 24. the condition of being protected from danger or risk
Down
- 1. a first or preliminary version of a device or vehicle from which other forms are developed
- 2. a fusible metal alloy used to bond work pieces
- 3. a plastic polymer which becomes more soft when heated and hard when cooled
- 6. a thermoplastic resin used to make beverage, food and other liquid containers, synthetic fibers, as well as for some other thermoforming applications
- 7. a word used to describe an action
- 8. a plan or drawing to show an outline of an idea.
- 12. an electric device that increases electrical signals
- 14. a protective garment worn over the front of ones clothes and tied at the back
- 15. a light-emitting diode
- 19. unit of electrical resistance
- 20. convert waste into a reusable material
- 21. the rate of flow of electric charge