Standard 3/Middle School/Benchmark 4
Benchmark Question: How is electricity used to create a
Focus Question: Where is a magnetic field located in
a simple circuit?
Small groups of students
will place a navigational compass on a flat surface. They will pass a
magnet near the compass, observe what happens, and discuss their
Next, they will construct a
simple circuit by using a 1.5 V battery and a twelve-inch length of bell
wire (18-22 AWG insulated wire). Each student will write a prediction about
where the magnetic field is located in the circuit. Then they will put a
navigational compass flat on a desk or other flat surface. They will place
the wire on top of the compass parallel to the needle and connect the
battery to the ends of the wire. Each student will write observations of
the movement of the compass needle. Students will compare and discuss results
with the whole class.
After students have
completed the activities, pairs of students will research and discuss one
of the uses of electromagnets and the advantages and/or risks of those uses
(MRI-magnetic resonance imaging, generators, etc.).
Note: When the circuit is connected, the
battery gets hot and drains quickly. Limit connected time.