ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item RG087002: A cell phone will be a little warmer after a man makes a call using the phone's speaker.
A man picks up his cell phone and notices that it feels cool. He turns on the phone and calls his friend. He turns on the speaker function so that he does not have to hold the phone while they talk. Will the cell phone be warmer or cooler after the man ends the call?
- The phone will be a little cooler after the man ends the call.
- The phone will be the same after the man ends the call.
- The phone will be a little warmer after the man ends the call.
- Whether the phone will be warmer or cooler depends on how much the man talked during the call.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 478
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 996 | 1911 | 52% |
| Grades | |||
| 4–5 | 208 | 410 | 51% |
| 6–8 | 381 | 811 | 47% |
| 9–12 | 407 | 690 | 59% |
| Gender | |||
| Male | 505 | 962 | 52% |
| Female | 477 | 919 | 52% |
| Primary Language | |||
| English | 894 | 1695 | 53% |
| Other | 77 | 167 | 46% |