Item CL002002: As a jar of water is warmed from the bottom, the water at the bottom of the jar becomes warmer than the water above it and starts to rise, and its thermal energy rises with it.

A jar of cold water is placed over a flame and the flame warms the water at the bottom of the jar, increasing its thermal energy.

What happens to the thermal energy of the water at the bottom of the jar?

  1. As the water at the bottom of the jar gets warmer than the water above it, the water rises and its thermal energy rises with it.
  2. Nothing moves until the water starts to boil, and then the water at the bottom of the jar rises and its thermal energy rises with it.
  3. The thermal energy of the water at the bottom of the jar rises but the water itself does not rise.
  4. The thermal energy of the water at the bottom of the jar rises and the water rises too, but the water and the thermal energy rise separately.
Distribution of Responses
Chart showing distrubtion of responses for Item CL002002
Students Responding Correctly
Group Correct Total Percent
Overall 956 2251 43%
Grades
  6–8 468 1197 39%
  9–12 486 1043 47%
Gender
  Male463108943%
  Female467107044%
Primary Language
  English849192144%
  Other7423531%

View data table