Framework for Constructing Scientifi c Explanations W

2. Framework for Constructing Scientific Explanations W. hat does it mean to construct a scientific explanation? What are the important features of scientific writing? How can you introduce those features to your students? Let's consider the following vignette from Mr. Lyon's eighth-grade classroom. Mr. Lyon's eighth-grade physical science class is examining what it means when a chemical reaction occurs, or more specifically, is discovering that a chemical reaction produces a new substance with different properties. Groups in his class dissolve a white powder in water to form a clear and transparent solution, then dissolve another white powder in water to form another clear and transparent solution. Student groups then pour the two clear liquids together and see a thick yellow solid that collects at the bottom of the test tube. Mr. Lyon hears several students say, Cool, and Where did that stuff come from? Mr. Lyon then asks the groups to work together 18.

20 Framework for Constructing Scientifi c Explanations again, “What can you add as the reasoning? Why does your evidence support your claim? Remember to make sure you include scientifi c principles.”

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