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How to Increase the Geyser Height of a Diet Coke Geyser
How changing the opening size affects the geyser height.
Note: This experiment only calls for 6 bottles of Diet Coke and 3 rolls of Mentos, but it's better to get extra in case something goes wrong. Like this, for example:
Don't attempt to explode your Diet Coke before doing the experiment!
So let's recap, shall we? Diet Coke+Mentos (not shown in picture)+geyser tube= EXPLOSION!!!!!
Only one Geyser Tube is necessary, but it's best to have three so that you can alternate them, only using one when it is completely dry. This ensures you have a controlled experiment.
Step 1: Find a grassy area outside to test in. No, it does not have to be along the Yellow Brick Road, but it adds a nice touch.
Step 2: Have one person in your lab group put on safety goggles. He/she is the only person allowed to enter...
The Zone of Death! Or whatever else you wish to call it.
Step 3: Have your entire lab group go outside carrying one roll of Mentos, one Diet Coke, the RD, and one dry Geyser Tube and cap, with the pin string.
Step 4: Have one person unscrew the cap on the Geyser Tube.
Step 5: Have another person carefully slide the pin through the two holes on the sides of the Geyser Tube and place the sleeve on the tube, covering the holes in the side.
Step 6: Make sure the pin string is not tangled and can be easily pulled out. ………………………………………………………….….… Step 7: Carefully place 5 Mentos into the Geyser Tube.
Step 8: Have the person with goggles step into the Zone of Death and place the Diet Coke bottle in the middle so that the cap is facing up. / Step 9: Have that person carefully unscrew the cap on it.
Step 10: Position your lab group so that one of the two remaining people is standing just outside the Zone of Death,holding the geyser tube,and another is far away, holding the video recording device.
Step 11: Have the person holding the Tube give it to the person in the Zone of Death, who in turn screws it onto the bottle.
The setup should look like this.
Step 12: Have the recorder start timing 30 seconds using the stopwatch. When the time is up, the recorder should give a signal to the two people at the Zone of Death and start recording.
Step 13: When given the signal, the person with goggles should carefully pull the pin string and the people near the Zone should stand back, preferably getting out of the Zone.
Are we done yet? Nope!
Step 14: Carefully dump the Diet Coke bottle in the field and throw away its cap. Retrieve the geyser tube cap and Geyser Tube, with the pin string, and take them back inside to dry.
Step 15: Have the recorder stop recording, remembering the height of the geyser. / Step 16: Have your entire group go back inside, carrying the Tube, the cap, the pin string, and the leftover Mentos.
The leftover Mentos can, but doesn't have to, be used for the next experiment. But don't eat it! It is strictly lab equipment.
Step 17: Place the Geyser Tube on the drying rack and put the cap and pin string in their proper containers.
Step 18: Repeat Steps 1-17, with the Geyser Tube cap off. Record both control trials' data (geyser height) in your Data Table.
Step 19: Repeat Steps 1-17 again, but with the 8 mm cap on the Geyser Tube. (Carry the new cap outside with you ) Do this twice with this cap size. Record the data for both trials in your Data Table.
Be sure to not remove the cap on the Geyser Tube this time!
Step 20- Repeat Steps 1-17 twice more, but with the 3 mm cap on the Geyser Tube. (New cap is carried outside) Record this data, for both trials, in your Data Table.
Step 21: Watch the videos the recorder took to make sure your data is accurate.
Step 22: Present your data in a graph and make a conclusion about your experiment.
Work Cited: "Along The Yellow Brick Road." Along The Yellow Brick Road. N.p., n.d. Web. 30 Sept. 2012. <http://alongtheyellowbrickroad.wordpress.com/about/>.
Work Cited continued: "Diet Coke Mentos." N.p., n.d. Web. 30 Sept. 2012. <http://en.wikipedia.org/wiki/File:Diet_Coke_Mentos.jpg>.
You guessed it, Works Cited continued: "Geyser Tubes For Mentos & Diet Coke Experiments." Squidoo. N.p., n.d. Web. 30 Sept. 2012. <http://www.squidoo.com/mentos-coke>.
And the last one: N.p., n.d. Web. 30 Sept. 2012. <http://t.walyou.com/walyou/>.
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