PART 1

You will now test Bulb 1 and Bulb 2 to make certain that they both light up. You will also answer a question about electrical circuits.

First, look at the electrical circuit shown in Diagram 4 below. Now, make a circuit using Bulb 1 that looks like the one shown in Diagram 4.

Diagram 4

Does Bulb 1 light up? (You may need to look straight down from the top to observe the bulb clearly.)

A) Yes

B) No

If Bulb 1 does not light up, raise your hand and someone will help you.

Now remove Bulb 1 (in its holder) from the circuit by unhooking the clips. Put Bulb 2 (in its holder) into the circuit to make certain that Bulb 2 works.

Does Bulb 2 light up? (You may need to look straight down from the top to observe the bulb clearly.)

A) Yes

B) No

If Bulb 2 does not light up, raise your hand and someone will help you.

The electrical circuit shown in Diagram 4 is called a “complete circuit.”

What is a complete circuit?

Sample correct student response:

What did you see in Diagram 4 that tells you that the circuit is complete?

Sample correct student response:

Score and Description

Complete:
Student response provides a correct explanation that consists of two parts:

• gives a physical description of a complete circuit indicating a closed loop for the flow of electricity

• indicates that the light bulb lights up (goes on; turns on)

Partial:
Student response addresses one part of a correct explanation.

Unsatisfactory/Incorrect:
Student response is inadequate or incorrect.

SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.