OpenSciEd Unit 8.2 · Lesson 03 · 3.A
Engage in argument from evidence to support or refute…
From Teacher Edition
Facilitation guidance from the lesson plan — what to notice in student thinking and how to respond while teaching.
Building towards
3.A Engage in argument from evidence to support or refute our predictions about whether all solid objects vibrate (cause) when they make sounds (effect), even when we cannot see them vibrate.
What to do
If students are struggling with reasoning on part 4 of the handout, remind them of the patterns they noticed when investigating the instruments. You might ask, If you wanted to make the drum or guitar sound louder, what did you have to do? What was the difference in what we could see on the video of the drum or with the laser when the sound was softer versus louder? What happened to cause that difference? Then connect this back to the Collisions Unit and the relationship between a force that deforms an object and energy; you might ask, What happens when a force contacts an object? What do you think is happening with the energy when the rock hits the table or the stick hits the drum?