1. Hickory Dickory Dock: The Biological Clock Assessment Slide Show

2. Match these pictures with the correct day’s photoperiod:
5:00 a.m.
7:00 a.m.
12:00 noon
4:00 p.m.
9:00 p.m.
Day A
5:00 a.m.
7:00 a.m.
12:00 noon
4:00 p.m.
9:00 p.m.
Day B
5:00 a.m.
7:00 a.m.
12:00 noon
4:00 p.m.
9:00 p.m.
Day C

3. 1. On what type of day would a bird want to prepare to fly south? Why?
2. On what type of day would a hen want to lay the most eggs? Why?
5:00 a.m.
7:00 a.m.
12:00 noon
4:00 p.m.
9:00 p.m.
Day A
5:00 a.m.
7:00 a.m.
12:00 noon
4:00 p.m.
9:00 p.m.
Day B
5:00 a.m.
7:00 a.m.
12:00 noon
4:00 p.m.
9:00 p.m.
Day C