Science/Strand IV/Content Standard 1/Middle School/Benchmark 5
Benchmark Question: How does current flow in simple
Focus Question: How many ways can you find to light
a light bulb?
The teacher will give groups
of students a “C” or “D” cell battery, a flashlight bulb, and two pieces of
wire. Ask students to see if they can make the bulb light. Students will
find several ways to make the bulb light. Students will discuss
similarities among the different ways they found to light the bulb. For
example, the points of contact on the battery will always remain the same.
Next, the students will try
to light the bulb using one wire. As students experiment, explain that an
electric bulb lights when it is part of a continuous path of materials that
form a loop through which the electrical current moves. This path/ loop is
called a circuit. Students will draw the circuit in each arrangement they
make and label the current flow with arrows.
(Extension: Discuss various examples of simple
circuits used in manufacturing, transportation, energy distribution, and