NAME _____________________________
Date ____________
Change in Temperature - Adapted from American Chemical Society (Inquiry in Action)
SC.4.P.9.1 Identify some familiar changes in materials that result in other materials with different characteristics, such as
decaying animal or plant matter, burning, rusting, and cooking.
Problem Statement: Does changing the amount of calcium chloride being mixed with a baking soda solution
decrease, increase, or have no effect on the temperature during their chemical reaction?
Hypothesis:_______________________________________________________________________________
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Variables:
Test (Independent/Manipulate) Variable: ____________________________________________________
Outcome (Dependent/Responding) Variable: _________________________________________________
Controlled (Constants) Variables: _________________________________________________________
______________________________________________________________________________________
Materials:
Baking soda solution, 100 mL
DampRid (calcium chloride)
Paper towels
2 ½ mL (1/2 Teaspoon)
2 Thermometer
Graduated cylinder, 50 mL
Goggles
5 mL (1 Teaspoon)
2 clear small plastic cups
1 blue tray
Timer
Procedures:
1. Use a graduated cylinder to measure 30 mL of baking soda solution and pour into one clear plastic cup.
2. Place a thermometer in the baking soda solution. Tilt the cup to make sure the bulb of the thermometer is
submerged. Observe thermometer in the baking soda solution for 2 minutes; record its temperature on the
chart.
3. While the thermometer is in the cup, add 15 mL (3 teaspoons) of DampRid (calcium chloride) and watch the
thermometer to observe any change in temperature. Record the highest reaction temperature.
4. Get a second cup and repeat steps 2-4 changing the amount of DampRid (calcium chloride)
to 22 ½ mL (4 ½ teaspoons).
5. Repeat steps 2-5 two more times for trials #2, #3, and #4.
6. Average the highest reaction temperature for both amounts of DampRid (calcium chloride).
7. Use your senses to make additional observations and record as part of qualitative data.
Department of Science
NAME _____________________________
Date ____________
DATA TABLE
Trial #1
Baking soda
solution
temperature
(°C)
Amount of
DampRid
(Calcium chloride)
in Teaspoon
3 tsp
4½
tsp
Trial #2
3 tsp
4½
tsp
Trial #3
3 tsp
4½
tsp
Trial #4
3 tsp
4½
Average
3 tsp
tsp
4½
tsp
Highest
reaction
temperature
(°C)
DATA: QUALITATIVE (USING YOUR SENSES) OBSERVATIONS
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Department of Science
NAME _____________________________
Date ____________
Conclusion: Answer the following questions to complete the Conclusion:
1. What was investigated? (State the purpose of the experiment by describing the problem statement.)
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
2. Was your hypothesis supported by the data? (Write a statement as to whether the data supports
or does not support the hypothesis including a restatement of the hypothesis.)
________________________________________________________________________________
________________________________________________________________________________
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3. What were the major findings? (Describe the data collected that provides the evidence as to why
the hypothesis was supported or not supported.)
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Application/Extension: Answer the following questions to complete the Application:
1. How can the investigation be improved?
________________________________________________________________________________
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2. What are some possible applications of the experiment? (Describe how the findings from this
investigation can be used in day-to-day life.)
________________________________________________________________________________
________________________________________________________________________________
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3. What question(s) has your experiment lead you to ask that could be tested in a new investigation?
________________________________________________________________________________
________________________________________________________________________________
Department of Science
NAME _____________________________
Date ____________
Claim Evidence Reasoning – CER – Conclusion Writing
Question: Does changing the amount of calcium chloride being mixed with a baking soda solution,
increase, decrease, or have no effect on the temperature during the chemical reaction?
Claim: (The answer to the question.)
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
Evidence: (All the evidence you gathered from hands-on investigations. This includes the
observations made and the data collected.)
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
Reasoning: (Why you think the answer is correct. The reasoning explains how the evidence helps
answer the question.)
________________________________________________________________________________
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________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
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Department of Science