Think back to the beginning of Mystery Class. Do you remember how little you knew? How have you come so far so fast? Retrace your journey. Fill in the sentences using these words (you'll use some words more than once.)

During Weeks 1-6:
a) I started by learning how to use the ______ times to calculate the ______ at each site. Then I graphed the week-to-week changes in ______ at each Mystery Class, and at my own location too.

b) Locations whose photoperiod ______ were in the ______ Hemisphere, while those whose photoperiod ______ were in the ______. Locations whose photoperiod changed very little were near the ______. A location's north/south position relates to the ______ part of its global address.

c) I narrowed my search by comparing each location's photoperiod to photoperiod at ______ location, which told me if a Mystery Class was ______ or ______ of me. After graphing and tracking the Mystery Classes for several weeks, I was also able to put them in order from ______to ______.

d) I discovered that I knew a lot about the ______ of the Mystery Classes, but I still didn't know anything about their ______. This is because tracking the changes in ______ does not tell you anything about ______.

During Week 7:
I finally learned how to estimate the ______ of the Mystery Classes by calculating the amount of time that passed on March _____ between ______ at ______ and sunrise at a specific Mystery Class using UT. I then converted that amount of time into ______, and divided that number by _____ to learn how many ______ away from Greenwich a specific Mystery Class was. Then I looked at the specific Mystery Class's UT sunrise time to see if it was before or after the UT sunrise time at Greenwich, and that told me if it was _____ or _____ . This calculation only worked on that date, the vernal ______ .

During Weeks 8 – 11:
I zeroed in on each Mystery Class with clues about their ______, ______, ______, and finally ______.