Original Project
Energy: Forms, Transformation, Transfer, and Conservation
Item NG022003: When water that is 40ºF is poured into a cup that is 70ºF, thermal energy is transferred from the cup to the water until they reach the same temperature.
The temperature of a plastic cup is 70ºF. It is filled with water that is 40ºF. Which of the following describes how thermal energy is transferred?
- Thermal energy is transferred from the water to the cup until they are both at 45ºF.
- Thermal energy is transferred from the cup to the water until they are both at 45ºF.
- Thermal energy is transferred from the cup to the water until the cup is at 60ºF and the water is at 50ºF.
- No thermal energy is transferred between the cup and the water, so the cup will stay at 70ºF and the water will stay at 40ºF.
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 1044 | 3015 | 35% |
| Grades | |||
| 6–8 | 564 | 1843 | 31% |
| 9–12 | 478 | 1162 | 41% |
| Gender | |||
| Male | 496 | 1447 | 34% |
| Female | 531 | 1509 | 35% |
| Primary Language | |||
| English | 944 | 2709 | 35% |
| Other | 73 | 222 | 33% |