Original Project
Atoms, Molecules, and States of Matter
For any single state of matter, the average speed of the atoms or molecules increases as the temperature of a su…
Item AM044007: As the temperature of a solid iron rod increases, the iron atoms that make up the rod move more quickly.
An artist heats a solid iron rod and bends it into a new shape. What happens to the iron atoms as the temperature of the solid iron rod increases?
- The iron atoms move more slowly after they are heated.
- The iron atoms move more quickly after they are heated.
- The iron atoms were not moving before they were heated, and they are not moving after being heated.
- The iron atoms were moving before they were heated, and they continue to move at the same speed after being heated.
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 2875 | 4422 | 65% |
| Grades | |||
| 6–8 | 1576 | 2578 | 61% |
| 9–12 | 1295 | 1831 | 71% |
| Gender | |||
| Male | 1387 | 2121 | 65% |
| Female | 1445 | 2231 | 65% |
| Primary Language | |||
| English | 2584 | 3910 | 66% |
| Other | 247 | 428 | 58% |
- Notes
- See NGSS performance expectation MS-PS1-4. Develop a model that predicts and describes changes in particle motion, temperature, and state of a substance when thermal energy is added or removed.