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Geology Science Fair Project

Fizzy Rocks: Vinegar on Rocks

Fizzy Rocks: Vinegar on Rocks | Science Fair Projects | STEM Projects
Join in on an exciting experiment that explores if rocks have calcite, commonly known as calcium carbonate! Pour vinegar on a small chunk of rock and see if it fizzes due to the acid dissolving the calcite.


The hypothesis is that rocks containing calcium carbonate will fizz when vinegar is poured on them, while those without calcium carbonate won't produce any bubbles. Vinegar reacts with calcium carbonate in an acid-base reaction to make carbon dioxide, a gas that will fizz.

Method & Materials

You will pour vinegar onto a small chunk of limestone rock, and observe as it fizzes. Next, you will perform the same test on other rocks to see which ones contain calcite. The limestone is the positive control because we know it has calcium carbonate.
You will need vinegar, a glass, a small chunk of limestone rock, and several different rock types to perform the experiment.


Through this experiment, rocks containing calcium carbonate fizzed when vinegar was poured on them, while those without it didn't produce any bubbles. This observation suggests vinegar can be used to determine if a rock has calcium carbonate. Calcium carbonate is commonly found in sedimentary rocks that contain the remains of shells and other organisms.

Why do this project?

This science project is interesting because it allows us to understand the composition of rocks by using a simple test that involves an acid-base reaction. It can also be a fun and easy way to test the diversity of rocks.

Also Consider

Some variations to consider include testing the effects of different acids, such as lemon juice (citric acid), on the rocks and comparing the fizzing results, or exploring the differences in the composition of rocks from different geological locations.

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!!
Come explore the fascinating world of rocks and minerals in this experiment! By listening for sound and observing bubbles, we can detect the presence of calcium carbonate in rocks. Get ready to learn about this amazing mineral in a fun and interactive way!
Get ready to unveil a mystery hidden within these large rocks! By soaking them in vinegar for two weeks, the bands of calcite will be dissolved away and the secrets lurking inside will be revealed. What fascinating discoveries await us at the end of this experiment? Let's find out!
In this experiment, vinegar is used to detect the presence of calcium carbonate, otherwise known as calcite, in various types of rocks. It's a fun and educational way to learn more about rocks!
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