Original Project
Energy: Forms, Transformation, Transfer, and Conservation
Thermal energy of an object is associated with the disordered motions of its atoms or molecules and the number a…
Item EG046003: When the average speed of molecules increases, the thermal energy of an object increases.
How is the average speed of the molecules of an object related to the thermal energy of the object?
- When the average speed of the molecules increases, the thermal energy of the object increases.
- When the average speed of the molecules increases, the thermal energy of the object decreases.
- The relationship between the average speed of the molecules and the thermal energy of the object depends on whether the object is a solid, a liquid, or a gas.
- The average speed of the molecules is not related to the thermal energy of the object.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 487
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 1547 | 3219 | 48% |
| Grades | |||
| 6–8 | 806 | 1797 | 45% |
| 9–12 | 736 | 1409 | 52% |
| Gender | |||
| Male | 803 | 1587 | 51% |
| Female | 722 | 1567 | 46% |
| Primary Language | |||
| English | 1382 | 2810 | 49% |
| Other | 127 | 310 | 41% |
- 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)...