Item AM042005: When a glass thermometer is placed in hot water, the level of liquid rises because the molecules get farther apart.

A glass thermometer has a colored liquid inside it. The level of colored liquid rises when the thermometer is placed in hot water.  Why does the level of liquid rise?

  1. Water molecules are pushed into the thermometer.
  2. Heat molecules push the molecules of the liquid upward.
  3. Heat causes the molecules of the liquid to get farther apart.
  4. The molecules of the liquid break down into atoms and take up more space.

Distribution of Responses

Chart showing distrubtion of responses for Item AM042005

Percent of students responding correctly

Grades 6–839%
Grades 9–1258%
Primary Language is English46%
Primary Language is not English33%

View data table