This activity explores the magnetic field around a current-carrying wire: Ørsted's Discovery. It's a bit fiddly when we do it in the classroom. The compasses can be thrown off by steel spines and/or leg plates in the tables. To be honest, I've seen compass behavior I cannot explain in my classroom. Perhaps strange things happen to our compasses while they're stored during the off-season. They are stored in proximity to bar magnets.
In any case, I got passably reasonable behavior from my compasses as I recorded the videos for the RT;DL observations of this activity.
Because I was recording the observations on behalf of the students, I provided them to the students in a disorganized way. Students would need to match the randomly sequenced observations with the called-for observations in the activity instructions. It's RT;DL ... you do what you can.
The HTML reports are preferred; the movie exports are provided for users whose devices struggle with the HTML exports. Links to all media are embedded in the student document.
Apologies for any clumsiness that comes through in the videos. The physical geometry required for recording these events is awkward, and I really didn't invest much time in rehearsal. I was happy to get decent light on my subjects.
Student Document (Google Docs copy link)
Observations (HTML and YouTube)
Answer Key (Google Docs)
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