Original Project
Atoms, Molecules, and States of Matter
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.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
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|---|---|---|---|---|---|---|---|---|
| n = 4422 |
6–8 n = 2578 |
9–12 n = 1831 |
Male n = 2121 |
Female n = 2231 |
English n = 3910 |
Other n = 428 |
||
| A. | The iron atoms move more slowly after they are heated. | 13% | 14% | 12% | 13% | 14% | 13% | 16% |
| B. | The iron atoms move more quickly after they are heated. | 65% | 61% | 71% | 65% | 65% | 66% | 58% |
| C. | The iron atoms were not moving before they were heated, and they are not moving after being heated. | 13% | 14% | 10% | 14% | 11% | 12% | 15% |
| D. | The iron atoms were moving before they were heated, and they continue to move at the same speed after being heated. | 9% | 10% | 7% | 8% | 10% | 9% | 11% |