Name: _________________________________________________________ Block: __________ Date: ___________________
Plop Plop … Fizz fizz
Introduction:
Purpose: To apply the scientific method through developing a hypothesis, analyzing data and drawing conclusions.
Scientific Problem: Which temperature of water will dissolve the Alka-Seltzer tablets the fastest?
Real World Uses of Alka-Seltzer: _____________________________________________________________
Hypothesis: Alka-Seltzer tablets will dissolve fastest in _______________ water and the slowest in _______________ water.
Experimental Design:
Materials: Tap water, warm water, cold water, beakers, stop watch.
Independent Variable (IV): ______________________________________________________________________________________
Dependent Variable (DV): _______________________________________________________________________________________
Constants: ______________________________________________________________________________________________________
Control: ________________________________________________________________________________________________________
Procedure:
1. 1Obtain 100mL of ice water.
2. Add one Alka-Seltzer tablet to the cup. (Only add one tablet at a time.)
3. Record the time (sec) for the tablet to completely dissolve. Discard the solution as directed by your
teacher.
4. Obtain 100mL of room temperature water. Repeat steps 2-3.
5. Obtain 100mL of hot water. Repeat steps 2-3.
6. To create repeated trials, record your group’s data on the class data table.
7. Compute the average time for dissolving at each temperature using values from the class data table.
8. Construct
an appropriate
graph Create
of the adata.
Step
4: Quantitative
Observations:
table to record your results.
Results Data Table:
Conclusion: Claim- Evidence-Reasoning
Name: _________________________________________________________ Block: __________ Date: ___________________
Question: Which temperature of water dissolves Alka-Seltzer tablets the fastest?
Claim: (Answer the question above in the space below)
Evidence
(What qualitative and/or quantitative evidence do
you have from the lab that supports your claim?)
Visual Description of Lab results:
Cold
Room
Temp
Hot
Written Summary of lab results (1-3 sentences):
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Reasoning
(What scientific concept helps to connect
your claim and supporting evidence? In other
words, why did your results turn out the way
that they did?)
Name: _________________________________________________________ Block: __________ Date: ___________________