Welcome to Steve Spangler Science. Skip directly to: main content, navigation, search box.

Soda Geyser Depth Charge Kit

A brand new device to use with your Mentos Geyser Tube

  • Soda Geyser Depth Charge Kit
    Item #: WGEY-300

    $9.99 In Stock

Usually ships out the next day.

Recommend for 4 years & up with adult supervision.

DOTD Sold-Out

When the Klutz company approached us about contributing to their new Boom, Splat Kablooey book, we were really excited to start research on a brand new device to be used with our original Geyser Tube™ creation.  If you’ve ever used our Geyser Tube, you’ve probably experienced the fun and exciting learning that can happen when you combine Diet Coke and Mentos.  But, now, you can use anything you can imagine to see what makes the best geyser.  Get ready, because your fun with geysers has just begun.  We’ll give you the original Geyser Tube, two of our new Geyser Tube Depth Charges and even a little rock salt to get your experimenting started.  All you have to provide is a few household materials and a lot of imagination! Recommended for children ages 4 and up.

What's included?

How does it work?

Soda geysers are powered by fizzy carbon dioxide gas dissolved in the soda. The trick is to make the bubbles collect at the bottom of the bottle and “push” the soda out the top. Rock salt and Mentos work as  “geyser starters” because each grain of salt and each Mentos has thousands of tiny pits all over the surface. These tiny pits are called nucleation sites – perfect places for carbon dioxide bubbles to form.  Now add the Depth Charge... it is weighted so that it quickly sinks to the bottom of the bottle and quickly disperses your geyser starter.

What does it teach?

Science Fair Connection:

Setting off a Mentos Geyser isn't, by itself, a science fair project. There are some very easy ways to make experimenting with geysers a great science fair project, though. The key to creating an awesome Mentos Geyser themed science fair project is isolating a variable. A variable is a component of the experiment that changes and, hopefully, alters the experiment. Some examples of possible variables with the Mentos Geyser include:
  • Try different brands or types of soda and find a way to measure which erupts the highest.
  • Test different geyser starters to find which starter material creates the tallest geyser.
  • Find out what temperature is best for geyser eruptions.
These are just examples of variations that you can try to turn the Soda Geyser Depth Charge Kit into a science fair project. Remember, you have to keep all other factors the same. If you're testing different brands of soda, make sure the geyser starter you use is always the same and that the sodas are kept at the same temperature.

Product FAQ

Warning - Choking Hazard

awesome

Mark tx   -  October 2, 2009

1 2 3 4 5
This user gave 5/5 stars


salt sorta works