ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item NG102003: A person will feel cooler when she holds a blanket up between her and a campfire because the blanket is blocking the energy being radiated by the fire.
A girl is sitting by a campfire. She feels warm even though she is not touching the fire.
What will happen if the girl holds a blanket up so that the blanket is between herself and the fire but not touching her?
- She will feel warmer because blankets keep people warm.
- She will feel cooler because the blanket is blocking the energy radiated by the fire.
- She will feel the same because holding the blanket up will not change the temperature of the air outside.
- She will feel the same because she will still receive the same amount of energy from the fire even though the blanket is between herself and the fire.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 474
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 2234 | 4051 | 55% |
| Grades | |||
| 4–5 | 230 | 527 | 44% |
| 6–8 | 913 | 1751 | 52% |
| 9–12 | 1091 | 1773 | 62% |
| Gender | |||
| Male | 973 | 1866 | 52% |
| Female | 1200 | 2068 | 58% |
| Primary Language | |||
| English | 2049 | 3612 | 57% |
| Other | 118 | 300 | 39% |
- Disciplinary Core Ideas
- PS3.B Light also transfers energy from place to place.
PS4.B When light or longer wavelength electromagnetic radiation is absorbed in matter, it is generally converted into thermal energy (heat). Shorter wavelength electromagnetic radiation (ultraviolet, X-rays, gamma rays) can ionize atoms and cause damage to living cells.