In this lab, students use flashlights and ping pong balls to simulate the moon phases. It will help students understand the question, “Why do we see different phases of the moon from Earth?” They work in groups of two or three and take turns observing the moon from different perspectives. While one student observes the moon, one partner holds the “moon” (ping pong ball) while the other partner holds the “sun” (flashlight). The partner holding the moon observes its shape in eight positions. The PDF preview cuts some of the words and pictures. It will not appear this way in the downloaded Word document.