Original Project
Weather and Climate II: Seasonal Differences
Item CL137001: When a container of water is warmed over a flame, warmer water at the bottom rises toward the top and the colder water at the top sinks toward the bottom.
Which of the following statements describes what happens when a container of water is warmed over a flame?
- Warmer water at the bottom rises toward the top and the colder water at the top sinks toward the bottom.
- Warmer water rises at the bottom toward the top but colder water at the top does not sink toward the bottom.
- The warmer water at the bottom does not rise. Thermal energy rises through the water, warming the water as it rises.
- The warmer water at the bottom and thermal energy both rise, but they rise separately.
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 888 | 2108 | 42% |
| Grades | |||
| 6–8 | 425 | 1014 | 42% |
| 9–12 | 460 | 1084 | 42% |
| Gender | |||
| Male | 441 | 1030 | 43% |
| Female | 430 | 1016 | 42% |
| Primary Language | |||
| English | 735 | 1733 | 42% |
| Other | 87 | 249 | 35% |