Item PT018001: Rocks can be solid, liquid, or in a slightly softened form.

Which of the following is TRUE about rocks?

  1. Rocks are always solid.
  2. Rocks are always either solid or liquid.
  3. Rocks are always either solid or are in a slightly softened form.
  4. Rocks can be solid, liquid, or in a slightly softened form.

Statistics for this item are available in the Original Project.