Physical Science: Session 8
Electrostatics Exhibits; The Exploratorium, "Open Pathways"
at a Glance:
Curriculum: The Exploratorium, “Open Pathways”
Topic: Electrostatics Exhibits
In this lesson, Linda Block’s fifth graders explore the electrostatic properties of materials through classroom activities and a field trip to the Exploratorium in San Francicso.
Adapted from the Exploratorium’s “Open Pathways” materials for teachers, the intent of this lesson is for the students to rub a clear plastic tube with different kinds of cloth in order to see if there are differences in the number of Styrofoam chips that can either be picked up or moved around inside of the tube. Linda identified the challenge for fifth graders in this way: “The idea that there is a charge in there or that there are electrons moving from something that seems like it's solid, is one that doesn't come naturally to students. So I think the more they are able to work with materials that allow them to actually feel forces, and to notice that certain things really are attracted to others, the more it helps them make the connection to what they learned in 4th grade about forces in magnets. So these are important first steps.”
Another important component of the lesson is the process skills that Linda developed while at the Institute for Inquiry at the Exploratorium. She explains, “In terms of inquiry, this would be the beginning, where they were just exploring with materials to kind of see what they do and to help them generate questions. And that was what I saw happening. There were a few little starting points or paths that some of the kids were going down, particularly around having the pieces of fabric in front of them and then wondering if they all would have the same result. I was impressed that some of them were being pretty systematic about trying them out.”
When students got to the Exploratorium, they were able to recognize, compare, and build on their experiences in the classroom. With the help of an “explainer,” they explored a variety of exhibits in which friction between different materials results in either “attractive” or “repulsive” behavior. According to Linda, “One of the things that's nice about taking the students on a field trip is that often times something doesn't necessarily make sense the first time you do it in a particular way. So while somebody might be puzzling over a particular question that we've been exploring in class, going to the museum and being able to play around with that idea at a number of different exhibits helps students learn. They might not get it the first time but hopefully, after they’ve worked with three or four or five different exhibits that all have to do with the same content area, one of them will provide an open door for someone to understand something in a new way that they didn't understand before.”
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