ChemMatters

6. when two originally uncharged bodies become charged when brought into contact and then separated
7. an elastic synthetic fiber
9. the arrival of a notable person, thing, or event
11. to form hair into a mass of small, tight curls or tufts
12. a semiconductor device used to amplify or switch electrical signals and power
15. a plug used in a jack socket, consisting of a shaft used to make a connection that transmits a signal
17. the thermodynamic work required to add one electron to the body
18. to give an incentive or encouragement to someone
20. artificial textile material composed of regenerated and purified cellulose derived from plant sources

1. a unit of current equal to one millionth of an ampere
2. an observable fact or event
3. a measurable physical characteristic or personal behavioral trait used to recognize the identity of an applicant
4. the energy difference between the valence band and the conduction band
5. not easily understood in an instinctive, unconscious way
8. an energy-harvesting device that generate electricity from waste mechanical energy from the ambient
10. to fasten or restrain
13. any agent that delays or hinders
14. tending to inhibit bonding between atoms
16. an electrical conductor used to make contact with a nonmetallic part of a circuit
19. not alike; different