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Item RG161002: Both a falling rock and a rock on a cliff have energy because all things have energy.

The figure below shows two identical rocks. The rock on the left is falling, while the rock on the right is sitting on a cliff.

Does either rock have energy?

  1. The falling rock has energy because it is moving, and things that move have energy. The rock on the cliff does not have energy because it is not moving.
  2. The rock on the cliff has energy because it has energy stored inside of it. The falling rock does not have energy because it gave off its energy when it started to fall.
  3. Neither rock has energy because rocks are not alive, and only living things have energy.
  4. Both rocks have energy because all things have energy.
Distribution of Responses
Chart showing distrubtion of responses for Item 161002
Scale Score for Item Difficulty
(200[Easy]-800[Difficult])
522
Students Responding Correctly
Group Correct Total Percent
Overall 2191 7008 31%
Grades
  4–5395198720%
  6–8 810 2669 30%
  9–12 986 2352 42%
Gender
  Male1021322132%
  Female1115357831%
Primary Language
  English2002624432%
  Other12553024%

View data table