Original Project
Substances, Chemical Reactions, and Conservation of Matter
Item SC057007: Two solids with the same melting point and color could be the same substance. (This item uses a table that lists properties of the solids.)
A student makes some observations about three solids and summarizes the results in the table below.
| Mass | Melting Point | Color | |
| Solid 1 | 3.0 g | 776°C | white |
| Solid 2 | 3.0 g | 445°C | white |
| Solid 3 | 9.8 g | 445°C | white |
Which of the solids could be the same substance?
- Solids 1 and 2 could be the same substance.
- Solids 2 and 3 could be the same substance.
- All of the solids could be the same substance.
- None of the solids could be the same substance.
(Modified from IQWST)
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 2375 |
6–8 n = 1259 |
9–12 n = 1095 |
Male n = 1105 |
Female n = 1216 |
English n = 2079 |
Other n = 224 |
||
| A. | Solids 1 and 2 could be the same substance. | 17% | 18% | 16% | 16% | 18% | 17% | 21% |
| B. | Solids 2 and 3 could be the same substance. | 51% | 46% | 56% | 50% | 51% | 51% | 47% |
| C. | All of the solids could be the same substance. | 11% | 12% | 11% | 11% | 11% | 11% | 15% |
| D. | None of the solids could be the same substance. | 21% | 24% | 17% | 22% | 20% | 21% | 17% |