OpenSciEd Unit 7.1 · Lesson 04 · 4.B
Look for: Baking soda and water were in every combinati…
MS-PS1-2MS-PS1-5Assessment opportunity · Formative assessment
From Teacher Edition
Facilitation guidance from the lesson plan — what to notice in student thinking and how to respond while teaching.
Building towards
4.B Construct and present a written and oral argument supported by citing empirical evidence and scientific reasoning that only certain combinations (patterns) of substances (water, baking soda, and citric) result (cause) in the formation of a gas (effect).
What to look / listen for
- Baking soda and water were in every combination that produced gas.
- Citric acid was also in every combination that produced gas.
- While there might be other substances in the lemonade mixtures as well, none of those were needed to produce a gas in one of the cases we tested (citric acid, baking soda, and water).
What to do
Support for encouraging students’ responses to each other is listed in the text of the teacher guide. If students are struggling to connect the arguments to the patterns in the data, refer back to the whole-class data chart (slide L) and/or the lemonade mix ingredient lists to ask, What similarities can we find here?