OpenSciEd Unit 7.2 · Lesson 03 · 3.B
Look for: Student models that represent the direction o…
From Teacher Edition
Facilitation guidance from the lesson plan — what to notice in student thinking and how to respond while teaching.
Building towards
3.B Develop a model to describe and/or explain the unobservable mechanism related to chemical reactions and the flow of energy to or from the reaction system and its surroundings.
What to look / listen for
/ listen for:
Student models that represent the direction of energy transfer out of the reaction system
Students’ relative representation of temperature changes as energy flows out of reaction systems and into food systems
Student responses to questions you pose as you monitor student pairs as they develop their models
What to do
This is the second time assessing this LLPE. You will also assess it at the end of this class. Listen as students respond to questions about energy transfer and how that changes based on the amount of matter (number of particles) in the reaction system. Pose questions to students for clarification of their thinking about energy flow between systems. Encourage students to think about amounts of energy relative to the first, 1X/1X model and use “greater than”, “less than”, or “about equal to” when describing the amount of energy transfer.