ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item RG067002: Saying that energy is used up when a machine operates means that some energy spread out to the surrounding environment as thermal energy, and that energy is now in a less useful form.
What does it mean to say that energy is used up when a machine operates?
- It means that some energy no longer exists because anything that uses energy destroys a little bit of that energy.
- It means that the energy is no longer useful to this machine. The energy still exists, and all of it is still useful because it was transferred someplace else where it can be used by another machine.
- It means that some energy spread out to the surrounding environment as thermal energy, and that energy is now in a less useful form.
- It means that all of the energy was converted to a form of energy that cannot be used again because energy can only be used once.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 1841 |
4–5 n = 360 | 6–8 n = 781 |
9–12 n = 700 |
Male n = 838 |
Female n = 952 |
English n = 1635 |
Other n = 148 |
|
| A. | 20% | 23% | 23% | 15% | 22% | 19% | 20% | 16% |
| B. | 28% | 29% | 27% | 28% | 26% | 30% | 28% | 24% |
| C. | 33% | 28% | 29% | 41% | 34% | 32% | 32% | 41% |
| D. | 19% | 19% | 21% | 16% | 18% | 19% | 19% | 20% |