Item AM044005: As a solid iron rod cools down, the iron atoms slow down but do not stop moving.

An artist heats a solid iron rod and bends it into a new shape. The iron cools down when the artist is finished. What happens to the iron atoms as the solid iron rod cools?

  1. The iron atoms move more quickly.
  2. The iron atoms slow down and stop moving.
  3. The iron atoms slow down but do not stop.
  4. The speed of the iron atoms does not change.

Distribution of Responses

Chart showing distrubtion of responses for Item AM044005

Percent of students responding correctly

Overall46%
Grades 6–841%
Grades 9–1252%
Male45%
Female46%
Primary Language is English47%
Primary Language is not English34%

View data table