Do Now: Answer this on a whiteboard:
If a chemical reaction gives off heat, are the bonds in the reactants or the products stronger? Unit Question: Why hydrogen fuel? Task 1: Fill out our model tracker for what we figured out in Lesson 6. Then we can skip the first three questions on their sheet. Task 2: See Google Classroom for your activity sheet for Lesson 7 Why doesn’t the energy that goes IN to break bonds and that comes OUT when bonds are formed just balance out? How might we investigate this question using the simulation? Make sure you are working as part of a group of at least three people. Choose who will work on which question and take 10 minutes to simulate the three different types of reactions. SMALL GROUP MODELING / EXPLANATIONS Use what you figured out in the last 4 investigations to explain and/or model on a separate sheet why the citric acid and sodium bicarbonate reaction resulted in a drop in temperature while burning fuel (either gasoline or ethanol) resulted in an increase in temperature. MODEL GALLERY WALK Post your model/explanation, then walk around the room to look at the other group’s work. Use sticky notes to leave feedback. After returning to your table, read through your group’s feedback and reflect on what you saw. What do you need to add or change about your model?
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AuthorChris Campbell Science Practices, Core Ideas and Crosscutting ConceptsArchives
June 2023
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