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.

Try to find all 27 words on this board.

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

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6E N M # # P # # # R E B E G T I E Z # #
7E # # A # # R # # # # M E L A T O N I N
8P # # # L L S A R C T I C C I R C L E #
9Y # T # I A A U C I R C A N N U A L N #
10# I W # G # H U O H A M S T E R S # D #
11# N E # H # # T R N I # # # # # # # O #
12# F N # T # # # O T E A # # # # # # G #
13# R T # L A E N I P S G S I F F R E E #
14# A Y # # # # # # E Y N O M E S I O N #
15# D F # # # # # # # Y H E X A # # # O #
16# I I # # E R U T A R E P M E T # # U #
17# A V # # # # # L A C I G O L O I B S #
18# N E # # # # # # N A I D A C R I C # #
19# # # # # # # # # # V # # # # # # # # #
20# # # # # # # # # # E # # # # # # # # #
Word X Y Direction
ARCTICCIRCLE  88e
BIOLOGICAL  1717w
CAVE  1117s
CIRCADIAN  1818w
CIRCANNUAL  99e
ENDOGENOUS  198s
EXOGENOUS  1516nw
EYE  1216nw
HAMSTERS  1010e
HYPOTHALAMUS  1215nw
INFRADIAN  210s
LIGHT  58s
MELATONIN  127e
MENSTRUAL  1416nw
NOISE  1914w
PINEAL  1013w
SCHOCHAT  44e
SCHOCHAT  44e
SCN  44sw
SIFFRE  1313e
SLEEP  14s
SLEEPY  14s
SUPRACHIASMATIC  1111se
TEMPERATURE  1616w
TWENTYFIVE  39s
ULTRADIAN  55e
ZEITGEBER  176w