In Lesson 17, students explore the Phenomenon Question: What causes an object to stay at rest even when a force is exerted on it? Students observe an Atwood machine and develop a model (SEP.2) to show ...
In Lesson 4, students use observations from Lesson 3 to develop and revise models (SEP.2) to describe that light reflecting from objects and entering the eyes (PS4.B) allows objects to be seen (CC.2).
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