In 1921, Earl Dickson invented a bandage after he noticed his wife was unable to easily cover cuts on her hands. He covered the bandage with a chemical that sealed it so air would not enter the cut. How did stopping air benefit others medically?

The questions have been asked in several important state and regional science exams in the United States. For example: TAKS-Texas Assessment of Knowledge and Skills, New York State Educational Department Regents exams, California Standards Test, etc.