1. Go to the website: phet.colorado.edu Click "Play with sims". Navigate to the "Physics" "Electricity, Magnets, & Circuits" section of the menu on the left side of the screen. Find the simulation "Circuit Construction Kit (DC Only)". Run the simulator and play with it to familiarize yourself with its features. 2. Using one battery, one light bulb, and as many wires as necessary in the simulator, find a way to make the light bulb turn on. Draw a sketch of the circuit when the light bulb is turned on. 3. (Multiple choice) You will notice that the battery and the light bulb each have two terminals. Which of the following arrangements makes the light bulb turn on? Explain your answer. Describe what happens in the situations in which the light bulb does not turn on. (a) Both terminals of the battery are connected to the terminal on the bottom of the light bulb. (b) Both terminals of the battery are connected to the terminal on the side of the light bulb. (c) The two terminals of the light bulb are both connected to one terminal of the battery. (d) One terminal of the battery is connected to the terminal on the bottom of the light bulb and the other terminal of the battery is connected to the terminal on the side of the light bulb. 4. Observe the motion of the electrons in the simulator. Describe the path that the electrons take in each of the arrangements from the options (a)-(d) in question #3. In the arrangement in which the light bulb turns on, explain why the path of the electrons allows the light bulb to turn on.

5. Turning a light bulb on takes energy. In the arrangement in which the light bulb turns, what is the source of the energy? 6. Write definitions of the terms current, resistance, open circuit, and closed circuit. Your definitions should be in words, not equation form.