Layers in a Test Tube

In this task, students are asked to consider whether mixing and heating two substances caused a chemical reaction to occur, based on data and students’ understanding of chemical reactions. This task is a classroom-based assessment that is designed to be independent of any particular curriculum or instructional sequence, and is intended to be used as a formative check of student understanding of an unpacked "part" (learning performance) of a performance expectation (PE). This task was developed as part of the Next Generation Science Assessment (NGSA) project, and can be found here.  

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