1. EQ: WHAT IS THE CIRCADIAN RHYTHM? 2/17

2. BELL RINGER 1.Why do people need sleep? 2.What times of day do you feel most alert/awake? What times of day do you feel most tired? Why?

3. CIRCADIAN RHYTHM Regular bodily rhythms that occur on a 24 hour cycle which corresponds to changes such as body temp., blood pressure, and hormone levels

4. WRITE 3 OBSERVATIONS ABOUT THE CIRCADIAN RHYTHM BELOW

5. 1. COMPARE AND CONTRAST BODY TEMP, SLEEP, AND MELATONIN 2. WHAT DO YOU THINK MELATONIN IS?

6. WHY DO PEOPLE EXPERIENCE JET LAG?

7. WHY WOULD TRAVELING EAST TO WEST BE EASIER THAN WEST TO EAST? HINT: EAST TO WEST YOU LOOSE TIME EX: IF ITS 5:00 PM AND YOU TRAVEL 5 TIME ZONES WEST IT IS 12:00PM BUT IF YOU TRAVEL 5 TIME ZONES EAST IT IS 10:00PM

8. STUDIES ESTIMATE IT TAKES 24 HOURS FOR EACH HOUR OF TIME CHANGE TO RESET YOUR CIRCADIAN CLOCK For the following examples use the timezone map and 1.Calculate how many time zones you would travel through 2.How many days would it take to reset your circadian rhythm? 3.Which of the trips would you experience the most intense and long lasting jet lag? 4.Which trips would have the least effect?

9. CHICAGO TO LOS ANGELES NEW YORK TO LONDON GERMANY TO NORWAY EGYPT TO BRAZIL

10. Chicago to LA: East to West- 2 New York to London: West to East-5-most intense jetlag Germany to Norway: No Change-least jet lag Egypt to Brazil: East to West-5