ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item RG019004: The air at the other end of a room gets warmer when a fan blows warmer air across a room.
The air in the room pictured is cool. A fire is warming the air near the fireplace. There is a fan next to the fireplace.
If a person turns on the fan to blow the warmer air across the room, will the air at the other end of the room get any warmer? Why or why not?
- No, because fans are only used to cool a room, they cannot be used to warm a room.
- No, because all of the air in a room is the same temperature, a blowing fan will not change the air temperature.
- Yes, because a fan can blow warmer air across a room, which makes the other end of the room warmer.
- It depends on the temperature of the air being blown by the fan. The air at the other end of a room will get warmer only if the air near the fire is a lot warmer than the air at the other end of the room.
CHA modified from CL15-2
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 536
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 1252 | 4673 | 27% |
| Grades | |||
| 4–5 | 233 | 850 | 27% |
| 6–8 | 532 | 1961 | 27% |
| 9–12 | 487 | 1862 | 26% |
| Gender | |||
| Male | 694 | 2148 | 32% |
| Female | 534 | 2418 | 22% |
| Primary Language | |||
| English | 1139 | 4246 | 27% |
| Other | 80 | 293 | 27% |
- None identified