1. “Mentos Geyser Experiment”
Experimental Design
“Mentos Geyser Experiment”
By. Thomas and Kade Brown

2. Is Mentos the only candy that makes Diet Coke erupt?
My Question
Is Mentos the only candy that makes Diet Coke erupt?

3. Research
The reaction with the Mentos and Diet Coke is not a chemical reaction but a physical reaction. This means that nothing new is happening.
The reaction occurs when the carbon dioxide gets trapped in nucleation sites(bumps on Mentos surface).
This reaction multiplies and the geyser is formed.

4. My Hypothesis
My hypothesis is that Mentos is not going to be the only one that works because it is a physical reaction, and other candies may have this same physical feature as the Mentos.

5. The Experiment
I tested out five different candies in this experiment including the Mentos.
I used a PowerAde bottle as a tube and I dropped all five candies into the diet coke and observed how high the geyser went on each.
Materials
Lemonheads
Sweetarts
Sweetart Shockers
Sour Skittles
Mentos
Six 2-liter Diet Coke bottles
PowerAde Bottle
Space
Controls and Variables
Control=Diet Coke
Independent Variable= Candy
Dependent Variable= Size of Geyser

6. Analysis 4 tr Type of Candy Size of Geyser Lemonhead Sour Skittles
Sweetarts
Sweetart Shockers
Mentos
Ok in size but not the largest
Largest of the 4 tested candies
Smallest of 4 tested candies
Around the same size as the Lemonheads
Went about 10 feet high
I observed that Mentos is not the only candy that makes Diet Coke erupt, but it is by far the largest geyser.

7. My Conclusion
My conclusion is that my hypothesis is somewhat correct. With their being a reaction with all of the candies, but with Mentos being a true eruption.