Polishing plastics (burnishing) uses ____ compounds to produce a polished surface.​

Laser power can be controlled to merely ____ the plastics surface or actually vaporize and melt it.

The hardened excretion of the lac bug has unique properties, and can be made into____. 

One of the five states that enacted bottle deposit laws in the 1970s is ____.

Natural rubber is very sensitive to temperature, but Charles Goodyear found that by kneading ____ into it improved its characteristics. 

What is an advantage of incineration?  

An early use for Bakelite was for ____. ​

The punching and shearing of laminar composite materials usually results in ____.

Automatic sorting systems detect the chemical makeup of material, such as the ____ systems that detect opacity.

The simplest endocrine control system directly responds to changing blood levels of ions and nutrients to stimulate hormone secretion. Which of the following is this simplest endocrine control system?