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
Students Responding Correctly
Group Correct Total Percent
Overall 1598 3656 44%
Grades
  6–8 964 2433 40%
  9–12 630 1215 52%
Gender
  Male770176344%
  Female801182344%
Primary Language
  English1434320145%
  Other13738036%

View data table