1. Lab report
By Beatrice J. martin Audrey Cheng, Raymond Donovan, Alex Bates and Cole Sperling.
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2. Question
What is the effect of the amount of alka seltzer on the distance the cap will travel?
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3. Hypothesis
If the amount of alka seltzer increases then the cap will go farther because there will be more force which will make the cap go further.
fiz

4. Controlled Variables (The variables that do NOT change)
The temperature of water
The angle of the launcher
The weather
The amount of water
The spot the launchers is placed
Weight of the cap
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Not change

5. Manipulated Variable/Independent Variable
The amount of alka seltzer
manipulated variable

6. Responding Variable/Dependent Variable (The variable that is measured)
The distance that the cap travels
distance

7. Pictures of launcher

8. Materials Water Alka seltzer Launcher Film canister Film cap Syringe
Measuring tape
Audrey

9. Procedure Get alka seltzer, water, launcher, tube and cap
(Write EACH and EVERY step in order. Include every step one needs to take to replicate the experiment exactly!
Get alka seltzer, water, launcher, tube and cap
Set launcher to 45o
Measure out 20 ml of water
Put tube in launcher
Pour the 20 ml of water into tube
Carefully tighten screw
Put alka seltzer in, put cap on quickly put cap on and stand at a safe distance.
Repeat steps 1-7 with ½ tablet, 1 tablet, 1 ½ tablets and 2 tablets
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10. Data Table: How The Amount of Alka-Seltzer affected the Distance
Responding Variable: Distance the Cap Traveled
Manipulated
Variable:
The amount of alka seltzer
Trial 1
Trial 2
Trial 3
Average
1/2
332
349
325
335 1/3 1
378
431
450
421 1/3
1 1/2
399
483
437 2/3
Audrey 2
460
462
532
600.3

11. Conclusion/Results
The more alka seltzer the farther the cap goes because more force is on the cap making the cap go farther. The faster the cap goes the longer it take gravity to pull it down. The longer it takes gravity to pull it down the further it goes.
raymond

12. Additional Questions
1.Would the Alka Seltzer work the same way if it was in someone’s mouth with a cap?
2.If we used seltzer and alka seltzer would the results change?
3.If we mixed alka seltzer, coke, baking soda, vinegar and mentos in a giant tube and giant launcher how far would it go?
raymond