... Measurements made of shadows can trace the path of the sun during the day. ... This chapter looks first at the phenomenon of shadows (how they are made), then uses measurements of shadows to track the motion of the sun across the sky. ... Topic 1: Light and Shadow . ... Try putting a pebble on the ground and asking the students to try to make a circle around it with the shadow of their fingers. ... One way to record the Sun's path is to track the shadow cast by a stationary stick. ...