ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item RG041003: When energy is converted from one form to another or transferred from one place to another within a system, the total amount of energy stays the same, but how useful it is decreases.
When energy is converted from one form to another or transferred from one place to another within a system, what happens to the total amount of energy in the system and how useful the energy is?
- The total amount of energy stays the same, and how useful it is stays the same.
- The total amount of energy stays the same, but how useful it is decreases.
- The total amount of energy decreases, but how useful it is stays the same.
- The total amount of energy decreases, and how useful it is decreases.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 523
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 323 | 1141 | 28% |
| Grades | |||
| 4–5 | N/A | N/A | N/A |
| 6–8 | 168 | 627 | 27% |
| 9–12 | 155 | 514 | 30% |
| Gender | |||
| Male | 152 | 559 | 27% |
| Female | 167 | 559 | 30% |
| Primary Language | |||
| English | 287 | 1003 | 29% |
| Other | 27 | 109 | 25% |
- Disciplinary Core Ideas
- PS3.B Conservation of energy means that the total change of energy in any system is always equal to the total energy transferred into or out of the system.
PS3.D Although energy cannot be destroyed, it can be converted to less useful forms--for example, to thermal energy in the surrounding environment.