What was the average geyser height for the control trials?
172 cm
100
Which additive had the lowest average geyser height?
Baking soda
100
The average salt geyser was how much higher than the control?
205-172=33cm
100
According to out data, does baking soda increase the mentos soda reaction?
No. The average baking soda geyser was lower than the control.
100
What happens to the geyser when gas escapes the bottle before releasing your thumb?
When gas escapes, there is less gas pressure to force out liquid and the geyser is lower than it should be.
200
What was the average geyser height for the "Equal" trials?
90cm
200
Which additive had the highest average geyser height?
Salt
200
The average Equal geyser was how much lower than the control?
172-90=82cm
200
Equal has aspartame, so we hypothesized (guessed) it would have a big reaction. Does the data support our hypothesis?
NO, Equal had less reaction than the control.
200
What happens to the geyser when the soda water is less carbonated to start with?
If the soda water is less carbonated, there is less gas to start with and the geyser will be lower.
300
What was the average geyser height for the "Sweet and Low" trials?
120
300
Which additive had the second lowest average geyser height?
Equal
300
The average sweet and low geyser was how much lower than the control?
172-120=52cm
300
According to out data, does sweet and low increase the mentos soda reaction?
No. The average Sweet and Low geyser was lower than the control.
300
What happens if a persons thumb stays on the bottle for too long before releasing?
If the tester's thumb is held on the bottle longer than the required time, extra gas has time to build up, causing a larger geyser.
400
What was the average geyser height for the "baking soda" trials?
87
400
Which additive had the second highest average geyser height?
sweet and low
400
The average baking soda geyser was how much lower than the control?
172-87=85cm
400
According to out data, does H2O2 increase the mentos soda reaction?
No. The average H2O2 geyser was lower than the control.
400
How could someone misread the height of the geyser.
The geyser happens quickly, so it is easy to not see the maximum height of liquid or where it lines up on the ruler.
500
What was the average geyser height for the "salt" trials?
205
500
Which additives made geysers that on average were higher than the control?
Only Salt
500
Put the additives in order from best to worst at making a bigger geyser. (compared to the control)
Salt, sweet and low, H2O2, Equal, Baking Soda.
500
Why does it make sense that salt helped the mentos soda reaction?
Because each salt crystal acted like another tiny mentos with many nucleation sites.
500
What is another source of error in this experiment that could be fixed with better equipment or procedures?
A better bottle design could fix the problem of escaping gas.
A high speed camera could better record the height of the geyser.
A better gas release mechanism could make the results more consistent.
Others?