Natural Rubber Is Very Sensitive to Temperature, but Charles Goodyear

question 4

Multiple Choice

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

• A) powdered horn
• B) gutta percha
• C) powdered sulfur
• D) shellac

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Definitions:

Selective Attention

The process of focusing on a particular object in the environment for a certain period of time, while ignoring irrelevant information.

Engrossed

Deeply absorbed or completely occupied with something, to the point of being unaware of anything else.

Clattering

The act of making a series of loud, rattling sounds, as when objects strike against each other.

Hue

A color or shade, the aspect of color which is determined by the wavelength of light.