ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item EG074003: The thermal energy of an object depends on the number and motion energy of the molecules that make up the object.
The thermal energy of an object depends on which of the following?
- Both the number and the average kinetic energy of molecules that make up the object
- The number of molecules that make up the object, but not their average kinetic energy
- The average kinetic energy of molecules that make up the object, but not the number of molecules
- Neither the average kinetic energy nor the number of molecules that make up the object
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 508
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 467 | 1238 | 38% |
| Grades | |||
| 4–5 | N/A | N/A | N/A |
| 6–8 | 216 | 647 | 33% |
| 9–12 | 251 | 591 | 42% |
| Gender | |||
| Male | 207 | 596 | 35% |
| Female | 252 | 620 | 41% |
| Primary Language | |||
| English | 407 | 1053 | 39% |
| Other | 49 | 151 | 32% |
- Disciplinary Core Ideas
- PS3.A Temperature is a measure of the average kinetic energy of particles of matter. The relationship between the temperature and the total energy of a system depends on the types, states, and amounts of matter present.
- NRC Framework
- Thermal energy is the random motion of particles (whether vibrations in solid matter or molecules or free motion in a gas)...