Which child doesn’t like a good explosion?
Then try this fun DIY coke volcano science experiment with your kids.
They will love their explosive STEM project!
All you need are two ingredients for a lot of fun.
Let’s get right into it!
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How Do You Make a Volcano With Coke and Mentos?
Before we start with our coke and mentos volcano instruction, let’s find out which supplies we will need.
Materials You Will Need for the Mentos and Coke Volcano
We used regular coke for the first time for this mentos volcano experiment but then found out that diet soda actually gets you better results.
The larger the coke bottle you choose the bigger your explosion will be. So why not choose a 2L bottle for our mentos soda volcano?
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Coke and Mentos Volcano Instructions
If you follow our easy step-by-step soda mentos volcano a great explosion will be guaranteed!
Step 1: Prepare your Soda
Open your bottle of soda carefully and position it on even ground so it can not tip over!
Step 2: Prepare Mentos
Now unwrap a roll of mentos.
Step 3: Add Mentos
The goal is to drop the mentos in the bottle at the same time. Which can be tricky!
Once all the mentos are dropped it is time to move out of the way as quickly as possible!
We used our hands to drop the mentos in at once but another method is to roll a piece of paper into a tube big enough to hold the loose Mentos.
Place a card or paper under the roll and put it on top of the bottle opening.
Then you can pull the card and the mentos will drop at the same time into your soda.
Step 4: Eruption
Quickly after all mentos are dropped you can watch your coke explode like a volcano!
Diet Coke Mentos Volcano Tips
- Make sure to try this experiment only together with an adult!
- Be aware that it’s a mess and think carefully about a location where you can place the coke! I recommend doing it outside in an open space with no ceiling or roof!
- The more mentos you use, the better the explosion will be.
The Science Behind Volcanos Out of Coke and Mentos
Before we start any experiment my children and I always talk about our project and I let them make their hypotheses.
After the actual experiment, we talked about their observation and if their hypotheses came true, why or why not that is and the science behind it.
So let’s find out why mentos make soda explode.
When the mentos sink into the coke bottle it creates rising bubbles, while at the same time, the candy forms carbon dioxide bubbles all over their surfaces.
As this happens the rising bubbles react with the carbon dioxide that is still dissolved in the soda and cause more carbon dioxide and bubbles to be freed with the result of a fun eruption.
Did you know STEM Education has many benefits? Read all about them here.
Your kids also might enjoy our popular Sherbet Experiment, explore this classic Skittle Experiment, or enjoy this magical Dishsoap Experiment.
Do you want to see the Coke and Mentos volcano experiment in action? Watch this video!
Pin Our Fun Coke Mentos Volcano Experiment
Don’t forget to save our Mentos Coke volcano science experiment on Pinterest for later!
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How did your kids enjoy their own Coke volcano with Mentos candy? Did it work for you?
Either way, let me know by leaving a comment below right now.
I’d love to hear from you!