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Science 8 Students Study Chemical Reactions 11/2/2022

Teacher places beef liver in cupSome eighth graders felt their science lab on Halloween was a little gruesome when they were given a slice of beef liver.  But curiosity replaced dread when they were told they were investigating endothermic and exothermic reactions.


For their first lab, students had to take the temperature of the beef liver in a cup before adding hydrogen peroxide. Then, they continued recording temperatures three more times at 30 second intervals. For the second lab, they followed the same steps, adding citric acid to baking soda in a separate cup. They collected all of their data on a digital chart provided by Stemscopes, the newly adopted middle school science curriculum. This lab was part of the unit: Thermal Energy and Chemical Reactions.


After collecting data, students were tasked with writing up conclusions using CER. First, they made claims by establishing which type of chemical reaction - endothermic or exothermic - each lab demonstrated. Next, they used the data collected as evidence for their claims. Finally, they explained the reasons the evidence proved their hypothesis.


Spring Hill Middle School teachers utilize the Claim - Evidence - Reasoning (CER) model across the curriculum to consistently foster student literacy.