Original Project
Substances, Chemical Reactions, and Conservation of Matter
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?
- Aluminum foil being cut into smaller pieces
- A drop of food coloring dissolving in water
- Melted butter becoming a solid when placed in the refrigerator
- The surface of a copper penny changing color after being in a drawer for years
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 1598 | 3656 | 44% |
| Grades | |||
| 6–8 | 964 | 2433 | 40% |
| 9–12 | 630 | 1215 | 52% |
| Gender | |||
| Male | 770 | 1763 | 44% |
| Female | 801 | 1823 | 44% |
| Primary Language | |||
| English | 1434 | 3201 | 45% |
| Other | 137 | 380 | 36% |