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Geology Science Fair Project

The Chocolate Rock Cycle

The Chocolate Rock Cycle | Science Fair Projects | STEM Projects
Have you ever wondered how rocks are made? This project will show you how chocolate can be turned into sedimentary, metamorphic, and igneous "rocks" using heat and pressure, just like in nature!


The hypothesis is that chocolate can be transformed into different "rocks" using heat and pressure, just like real rocks in nature.

Method & Materials

You will scrape and press chocolate to create sedimentary "rocks", then heat and cool them to make metamorphic "rocks". Finally, you will heat the chocolate to liquid and let it cool down to make igneous "rocks".
You will need blocks of dark and white chocolate, hot water, aluminum foil or cake cups, a container for the hot water, and a scraping tool like a plastic knife.


By using chocolate to represent rocks, this project demonstrates how nature can transform and change things over time. Plus, at the end, you get to enjoy a tasty treat made from your "rocks"!

Why do this project?

This science project is unique because it allows you to make different types of "rocks", but in a safe and delicious way using chocolate.

Also Consider

To make it more challenging, try using different types of chocolate, or adding other ingredients like nuts or sprinkles to create more complex "rocks". Another variation is to experiment with different heating and cooling times to see how it affects the final product.

Full project details

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

Related video

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!!
It's really cool to see the difference in appearance between the three types of chocolate rocks: sedimentary, metamorphic, and igneous rocks!
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