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Astronomy Science Fair Project

Oreo Moon Phases

Oreo Moon Phases | Science Fair Projects | STEM Projects
Explore the fascinating phases of the Moon with Oreo cookies! Learn why the Moon looks different every night and make delicious models of the moon phases by removing the filling!


The hypothesis is that the different phases of the moon can be represented with oreo cookies.

Method & Materials

You will use Oreo cookies to make edible Moon models, scraping off the filling to create the New Moon, First Quarter, Full Moon, and Third Quarter phases. Compare them to see how the Moon changes shape.
You will need Oreos, a popsicle stick or kid-friendly knife and two plates.


As the Moon orbits the Earth, it appears to change shape because of the sunlight reflecting off its surface. By creating edible Moon models, it becomes clear how the Moon's phases change.

Why do this project?

This science project is fun to do because it combines a snack with astronomy. It allows you to visually and tastefully explore the phenomenon of the Moon's phases, making it an engaging learning experience.

Also Consider

Observe the Moon in the sky and compare it with the Oreo models to see the similarities and differences between the real Moon and the edible representations.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!
Check out this cool video on moon phases from NASA with clear demonstrations on why we see the different shapes of the Moon!
Explore why we see the 8 different moon phases and how to do the oreo moon phases activity with this detailed video from the Louisiana Art & Science Museum!
Follow along with this Oreo moon phase activity from the University of Michigan Museum of Natural History, which includes a helpful drawing of the Earth and the Sun. The drawing will help you understand why we see different shapes of the Moon.
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