Item SC071003: The surface of a copper penny changing color after being in a drawer for years is an example of a chemical reaction.

Which of the following is an example of a chemical reaction?

  1. Aluminum foil being cut into smaller pieces
  2. A drop of food coloring dissolving in water
  3. Melted butter becoming a solid when placed in the refrigerator
  4. The surface of a copper penny changing color after being in a drawer for years

Distribution of Responses

Chart showing distrubtion of responses for Item SC071003

Percent of students responding correctly

Overall44%
Grades 6–840%
Grades 9–1252%
Male44%
Female44%
Primary Language is English45%
Primary Language is not English36%

View data table