Part 3 - Experiment and Data Collection
- To begin the experiment, have students start an Ambient Light recording, turn off the screen, and put the eye model box over the phone. If students are using a flashlight, have them turn it on and shine it directly over the circles on the paper, about a foot above the box model.
- Have students wait about five seconds, then remove the box, turn on the phone, and stop the recording.
- Have students tap the recording and crop off the beginning and ending so that just the relevant light measurement is shown when the box was placed over the phone.
- Have students press the Pencil icon to give this recording an appropriate name (i.e., Eye Closed).
- Have students now cut out the small dotted circle. If they fold the paper in half lengthwise, they can cut a semicircle on the fold and the entire circle will be cut out.
- Ask students what the box modeled before any circles were cut (Answer: a closed eye.) Now ask what the box models when the small circle is cut (Answer: a small pupil.) Ask when a pupil is small (Answer: in bright light.)
- Now repeat the steps above in which students start recording Ambient Light, turn off the screen, and put the box over the phone. Shine the flashlight for five seconds at the same height directly over the circle cut-out. Have students tap the recording and crop the beginning and end so that the relevant recording is left, and give the recording a name.
- Have students repeat these steps, cutting out the next circle, making a new recording, and then cutting out the final circle and making a new recording.
- Ask students what the larger and larger circles are modeling (Answer: a pupil growing larger.) Ask why a pupil would grow larger (Answer: to let in more light if the environment is getting darker.)