The document provides instructions to color code pictures that show changes from the application of heat or the presence of oxygen. Students are asked to color a "like" symbol next to pictures that change with heat and a "surprised face emoticon" next to pictures that change in the presence of oxygen.

1. Activity 5:
Color the “like” symbol if the picture shows changes when there is application
of heat. Color the “surprised face emoticon” if the picture shows changes when there
is a presence of oxygen.