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:

Henry David Thoreau

A 19th-century American essayist, poet, and philosopher, best known for his works "Walden" and "Civil Disobedience," emphasizing simple living and civil liberties.

U.S. War

Refers to any military conflict involving the United States, ranging from declared wars by Congress to military interventions and conflicts abroad.

Disputed Territory

Land that is claimed by two or more countries, or within a country claimed by different groups, leading to conflicts over sovereignty and control.

Southern Texas

A geographic area of Texas in the United States, characterized by its proximity to the Mexican border and distinct cultural, economic, and natural features.