These errata apply only to all versions of the Physical Sciences books.
Activity 2: Systems and System Models (Page 4)
Under the "Types of Model" heading, the text should read:
Visual models can include drawings, schematics, and three dimensional models. These can be made out of materials such as clay and ice-cream sticks, such as this model of a water molecule (below).
In the mathematical model, the caption should indicate "as shown right".