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

X
Y
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1# # # # # L # # N # # # # # # # # # # #
2# M # N # A # # A # # # # # # # # # # #
3# E # C # E # # I S # # # # # # # # L #
4# L # S # N # # D R # # # # # # # A I #
5# A # C U I # # A E # # # # H # C # G #
6# T # H L P # # C T # # # Y # I # # H #
7# O # O T S R # R S # # P # G E # # T L
8# N # C R L U A I M # O # O # V # E # A
9# I # H A E # O C A T # L # # I R L # U
10# N # A D E # # N H # O # # # F # A # R
11# # # T I P # # A E I # # # F Y # U # T
12# # # P A Y # L X B G A # I # T # N # S
13# # # E N # A O # # # O S # # N # N # N
14# # # E # M G # # # # # D M # E # A # E
15# # # L U E # # # E S I O N A W # C # M
16# # # S N E R U T A R E P M E T # R # #
17# # # O # # # # N A I D A R F N I I # #
18# # U # # Z E I T G E B E R E V A C # #
19# S # # # E Y E L C R I C C I T C R A #
20# # # # # # # # # # # # # # # # # # # #
Word X Y Direction
ARCTICCIRCLE  1919w
BIOLOGICAL  1111ne
CAVE  1818w
CIRCADIAN  99n
CIRCANNUAL  1818n
ENDOGENOUS  1516nw
EXOGENOUS  1011sw
EYE  819w
HAMSTERS  1010n
HYPOTHALAMUS  155sw
INFRADIAN  1717w
LIGHT  193s
MELATONIN  22s
MENSTRUAL  2015n
NOISE  1415w
PINEAL  66n
SCHOCHAT  44s
SCHOCHAT  44s
SCN  44n
SIFFRE  1313ne
SLEEP  416n
SLEEPY  67s
SUPRACHIASMATIC  1111se
TEMPERATURE  1616w
TWENTYFIVE  1616n
ULTRADIAN  55s
ZEITGEBER  718e