Hands On Activity Big Idea 9: Changes in Matter

Department of Science

Grade 5Change in Temperature Lab

Adapted from American Chemical Society Inquiry in Action Activity 5.6

http://www.inquiryinaction.org/download/

Big Idea 9: Changes in MatterSC.5.P.9.1 Investigate and describe that many physical and chemical changes are affected by temperature.SC.5.N.1.1 Define a problem, use appropriate reference materials to support scientific understanding, plan and carry out scientific investigations of various types such as: systematic observations, experiments requiring the identification of variables, collecting and organizing data, interpreting data in charts, tables, and graphics, analyze information, make predictions, and defend conclusions.SC.5.N.1.3 Recognize and explain the need for repeated experimental trials. SC.5.N.1.6 Recognize and explain the difference between personal opinion/interpretation and verified observation.

Department of Science

Hands On Activity Change in Temperature Lab

Department of Science

Question to Investigate: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?

What do we need to understand first?What is calcium chloride?

What is baking soda?What are they used for?

How can we find out?

Department of Science

 Trial #1 Trial #2 Trial #3 Trial #4 Average

Baking soda solution

temperature (°C)

               

Amount of DampRid (Calcium

chloride) in Teaspoon

 

3 tsp

 

4 ½

tsp

 

3 tsp

 

4 ½

tsp

 

3 tsp

 

4 ½

tsp

 

3 tsp

 

4 ½

tsp

 

3 tsp

 

4 ½

tsp

Highest reaction

temperature (°C)

                   

DATA TABLE

Conclusion

1. What was investigated?

2. Was your hypothesis supported by the data?

3. What were the major findings?  

Conclusion: Sample Responses1. What was investigated?

How will increasing the amount of calcium chloride (DampRid) mixed with baking soda solution affect temperature change in the chemical reaction was investigated.

2. Was your hypothesis supported by the data?

The hypothesis was supported (was not supported) by the data. Increasing the amount of calcium chloride (DampRid) will increase the temperature of the chemical reaction.

3. What were the major findings?  

In all _____ trials, increasing the amount of calcium chloride (DampRid) increased the temperature of the chemical reaction. The average temperature increase for the ___ trials was __ °C.

Application

1. How can the investigation be improved?

2.What are some possible applications of the experiment?

3. What question(s) has your experiment lead you to

ask that could be tested in a new investigation? 

Application: Sample Responses1. How can the investigation be improved?

Watching out for human error by using better accuracy to measure the amount of the substances and/or to read the thermometer. Using cups with a smaller circumference so that the bulb of the thermometer is submerged deeper.

2. What are some possible applications of the experiment?

Increasing the amount of calcium chloride (DampRid) can decrease the amount of humidity in a room. The mixing of calcium chloride (DampRid) and baking soda solution can be used as a source of heat energy to melt ice on roads. (de-icer)

3. What question(s) has your experiment lead you to ask that could be

tested in a new investigation?

What effect would changing (increasing or decreasing) the amount of

baking soda have on the temperature of a chemical reaction?

Will the rate at which the gas and white precipitate form increase,

decrease, or stay the same as a result of increasing the amount of DampRid?

2.  

Change in Temperature Lab Assessment Rubric

Department of Science

Writes a conclusion using the CER model.

(New investigation)

30 ml

CER Conclusion WritingDoes 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?

Claim: (The answer to the question)Evidence: (All the evidence you gathered from hands-on investigations.) The evidence includes the clues: the data collected and the observations made.Reasoning: (Why you think the answer is correct.)The reasoning explains how the evidence helps answer the question.

Department of Science

CER Conclusion Writing: Sample Responses

Question: 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?

Claim: Increasing the amount of calcium chloride (DampRid) mixed with baking soda solution increases the temperature of the chemical reaction between the two substances.

Department of Science

CER Conclusion Writing: Sample Responses

Evidence: The data collected in the investigation showed the following when the amount of calcium chloride being mixed with a baking soda solution was increased from 3 teaspoons to 4 ½ teaspoons in each of the trials. In trial 1 – the temperature increased from __ °C to __ °C ; In trial 2… (Record data collected in each trial). The average of all trials showed a temperature increase of ___°C when increasing the amount of calcium chloride from 3 teaspoons to 4 ½ teaspoons.Additional signs of a chemical change observed included bubbles and fizzing from the gas being produced and the formation of a solid white substance in the bottom of the cup.

CER Conclusion Writing: Sample Responses

Reasoning:An increase in temperature is a sign of a chemical change. The results from the investigation support the claim that increasing the amount of calcium chloride (DampRid) mixed with baking soda solution will increase the temperature of the chemical reaction. In all of the trials the effect of increasing the amount of calcium chloride while keeping the amount of baking soda solution the same increased the temperature of the reaction an average of _____ °C. This evidence confirms that changing the test variable when mixing substances can affect the temperature of the chemical reaction.