Original Project
Weather and Climate II: Seasonal Differences
Item CL138001: As a jar of water is warmed from the bottom, the water at the bottom of the jar becomes warmer than the water around it and starts to rise.
A jar of water is placed over a flame and the flame warms the water at the bottom of the jar.
What happens to the water at the bottom of the jar before it boils?
- As the water at the bottom of the jar becomes a little warmer than the water around it, the warmer water will start to rise.
- The water at the bottom of the jar will get warmer, but it will not rise.
- The water at the bottom of the jar will get warmer and warmer, but it will not rise until it starts to boil.
- All of the water in the jar will get warmer at the same time, so there is no movement of the water in the jar.
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 2491 | 4621 | 54% |
| Grades | |||
| 6–8 | 1227 | 2431 | 50% |
| 9–12 | 1257 | 2167 | 58% |
| Gender | |||
| Male | 1234 | 2259 | 55% |
| Female | 1176 | 2201 | 53% |
| Primary Language | |||
| English | 2107 | 3867 | 54% |
| Other | 258 | 521 | 50% |