As you think about (or hear others talk about) what makes a good friend, you might try to classify them as personal qualities – like honesty, kindness, and loyalty – or as personal interests – like sports, video games, or music.

In the table below, make a list of three personal qualities that are meaningful to you, and a list of three interests that you might share with a friend

You have seen circuits that require all three conditions, and circuits that only require one of the three conditions. Study the two circuits shown below, and answer the questions that follow. (If you like, you can create and explore these circuits using the Free Draw tool in the Crack the Circuit website.)

• Which circuit would work better for your questions about Personal Qualities (1,2,3 in the chart above)? Why did you choose that? Are the switches connected in series or in parallel?

• Which circuit would work better for your questions about Personal Interests (A,B,C in the chart above)? Why did you choose that? Are the switches connected in series or in parallel?

• Choose your most important Personal Quality from the chart above (1, 2, or 3) and any two of your Personal Interests. What kind of circuit would do a better job of combining the two? How did you decide?

• Choose your most important Personal Interest from the chart above (A, B, or C) and any two of your Personal Qualities. What kind of circuit would do a better job of combining the two? How did you decide?