Finer Values for the use of Graphite Powder
This activity is planned for the third and fourth classes of the first two months with the intention of building with the students the concept of electric current in a course of Electromagnetism in High School. It was inserted after the students worked with a simple circuit consisting of a battery, one or two wires and a lantern lamp. In this class the students set up the circuit and had to explain how and why the light comes on, using sentences and drawings, with the wire extended so that the teacher could perceive the student’s ideas about the metal structure and how they imagined something “moving”. in this structure. The graphite powder for li-ion battery anode use is essential now.
How to intervene with spontaneous conceptions

From the answers given by the students about circuits I decided to insert the experiments “electrolysis” and “Daniell’s cell” next, with the …





