Calculate photoperiod using sunrise/sunset data to estimate latitude.

• Look up Sunrise/Sunset
• Record and Graph

• January 29
• February 5
• February 12
• February 19
• February 26
• March 4
• March 11
• March 18
• March 25
• April 1
• April 8

Narrow the search from continent to country to city.

• March 18 (continent/reg.)
• March 25 (country)
• April 1 (state/province)
• April 8 (city/town)

• Mystery Class #1
• Mystery Class #2
• Mystery Class #3
• Mystery Class #4
• Mystery Class #5
• Mystery Class #6
• Mystery Class #7
• Mystery Class #8
• Mystery Class #9
• Mystery Class #10