Technology crossword

5. the study of people's efficiency in their working environment.
9. a substance used for grinding, polishing, or cleaning a hard surface.
10. a roughly circular line, route, or movement that starts and finishes at the same place
11. an electromotive force or potential difference expressed in volts
12. sharply pointed tool used for marking lines
13. work or operate in a proper or particular way.
14. denoting substances that become plastic on heating
17. step-by-step sequence of activities that must be followed in order
18. a prepolymer material that cures irreversibly
19. a pictorial symbol for a word or phrase
21. a plan or drawing produced to show the look and function or workings
23. the condition of being protected from or unlikely to cause danger, risk, or injury

1. a very large, chain-like molecule made up of monomers
2. a doing word
3. bring together parts or combine to create something
4. a protective garment worn over the front of one's clothes and tied at the back
5. he making of a judgement about the amount, number, or value of something
6. a standard by which something may be judged or decided
7. use to remove scratches off plastic
8. made from polymers of acrylic acid or acrylates.
9. concerned with beauty or the appreciation of beauty
15. A first version device or vehicle from which other forms are developed
16. convert waste into reusable material
20. protecting the eyes from glare, dust, water, etc.
21. a tool or machine with a rotating cutting tip for making holes
22. make a rough drawing of something