Understanding Moon Phases with the Sun and Earth

Have you ever noticed that the Moon changes shape in the sky from night to night? These changes are called moon phases, and they happen because of the Moon’s position around Earth. With this worksheet, you explore how the Sun, Earth, and Moon work together to create these patterns. Each activity helps you connect what you see in the sky with scientific explanations. As you learn, the Moon’s changing shapes begin to make sense.

Your journey begins by understanding where the Moon gets its light. The Moon does not make its own light—it reflects light from the Sun. As the Moon orbits Earth, different parts of it are lit up. Activities guide you to observe how the amount of visible light changes depending on position. This helps you understand why the Moon appears to grow and shrink.

Next, you explore the main phases of the Moon. You learn about the new moon, crescent, first quarter, full moon, and last quarter. Through examples, you see how these phases follow a repeating cycle. Activities help you arrange phases in order and recognize patterns over time. This builds your ability to understand cycles in nature.