Biological Rhythms: the sleep-waking cycle

ARCTICCIRCLE
BIOLOGICAL
CAVE
CIRCADIAN
CIRCANNUAL
ENDOGENOUS
EXOGENOUS
EYE
HAMSTERS
HYPOTHALAMUS
INFRADIAN
LIGHT
MELATONIN
MENSTRUAL
NOISE
PINEAL
SCHOCHAT
SCHOCHAT
SCN
SIFFRE
SLEEP
SLEEPY
SUPRACHIASMATIC
TEMPERATURE
TWENTYFIVE
ULTRADIAN
ZEITGEBER

See how much you remember about biological rhythms and the sleep-waking cycle with this wordsearch. Answer the questions first then look for the missing word in the grid below.

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N H U Q Y N A F R Q U O J V A V P A E Q
I H M N E S E M B D S N V I C M B W Y K
N R H X S U O N E G O D N E O P V G D H
O E L C I R C A D I A N L L Y I W E X P
T B A N I R I K B Q D S A C Z E W V G C
A E U D J T O X A J D R U R R A W I T E
L G R A R E A M K Q M E N I D U Z F I S
E T T W T M Z M X X Y T N C S E W Y Z I
M I S R H P R G S J Z S A C N K N T N O
Z E N N G E B Y L A S M C I S E A N G N
H Z E O I R V C S U I A R T F L I E K A
S U M A L A H T O P Y H I C B A D W I I
C L T H M T Q X H E V A C R B E A T I D
H Q E L H U E X A M K F H A U N R P R A
O G N E K R Q E S W Q D K R R I T E B R
C X H A P E X O G E N O U S L P L E S F
H X B U K Y W X G R Z D Z L N O U L R N
A B L A C I G O L O I B E R F F I S Y I
T P R L I I J A C Y U X F P H K Q C P K
I E A E F G Q E W Y B M U X A M D N R J
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Answer Key for Biological Rhythms: the sleep-waking cycle

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1N # # # # # # # # # # # # # # # # # # #
2I # # # # # # # # # # # # # # # # # # #
3N R # # S U O N E G O D N E # # # # # #
4O E L C I R C A D I A N L L Y # # E # #
5T B A # I # # # # # # S A C # E # V # #
6A E U # # T # # # # # R U R # # # I # E
7L G R # # E A # # # # E N I # # # F # S
8E T T # T M # M # # # T N C # # # Y # I
9M I S # H P # # S # # S A C # # N T # O
10# E N # G E # # # A # M C I # # A N # N
11# Z E # I R # # # # I A R T # L I E # A
12S U M A L A H T O P Y H I C # A D W # I
13C L # # # T # # # E V A C R # E A T # D
14H # E # # U # # # # # # # A # N R P # A
15O # # E # R # # # # # # # # R I T E # R
16C # # # P E X O G E N O U S # P L E # F
17H # # # # Y # # # # # # # # # # U L # N
18A # L A C I G O L O I B E R F F I S # I
19T # # # # # # # # # # # # # # # # C # #
20# # # # # # # # # # # # # # # # # N # #
Word X Y Direction
ARCTICCIRCLE  1414n
BIOLOGICAL  1118w
CAVE  1313w
CIRCADIAN  44e
CIRCANNUAL  1313n
ENDOGENOUS  143w
EXOGENOUS  616e
EYE  143se
HAMSTERS  1212n
HYPOTHALAMUS  1212w
INFRADIAN  2018n
LIGHT  512n
MELATONIN  19n
MENSTRUAL  312n
NOISE  2010n
PINEAL  1616n
SCHOCHAT  112s
SCHOCHAT  112s
SCN  1818s
SIFFRE  1818w
SLEEP  1818n
SLEEPY  112se
SUPRACHIASMATIC  1111nw
TEMPERATURE  66s
TWENTYFIVE  1813n
ULTRADIAN  1717n
ZEITGEBER  210n