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.

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

X
Y
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1# # # # # # # Z S U O N E G O X E # # #
2# # # # N O I S E # # # # # # V # # # N
3# # # # # A L A C I G O L O I B # # C #
4# # # # # # I # # # T # # F # # # S # #
5Y # # # # E # D # # # G Y # L # U C # #
6P # # # R E # L A # # T E A # P L H # #
7E # # F # R # A # R N # E B R # T O # #
8E # F # # U # U # E F N # A E # R C # #
9L I # # # T # R W # I N C R # R A H # #
10S U M A L A H T O P Y H I C # # D A # #
11# # E # I R # S # # I A R T # # I T # #
12# # L # G E # N # A # M C I # # A # # #
13# # A # H P # E S # # S A C # # N # # #
14# # T # T M # M L # # T N C # # # # # #
15# # O E # E A # E # # E N I # # # # # #
16# # N V # T # # E # # R U R # # # # # #
17# # I A I # # # P # # S A C # E # # # #
18# # N C I R C A D I A N L L Y # # # # #
19# # # # S U O N E G O D N E # # # # # #
20# # # # # # # # # # # # # # # # # # # #
Word X Y Direction
ARCTICCIRCLE  148s
BIOLOGICAL  153w
CAVE  418n
CIRCADIAN  418e
CIRCANNUAL  139s
ENDOGENOUS  1419w
EXOGENOUS  171w
EYE  1419ne
HAMSTERS  1210s
HYPOTHALAMUS  1210w
INFRADIAN  1310nw
LIGHT  510s
MELATONIN  310s
MENSTRUAL  814n
NOISE  52e
PINEAL  1010ne
SCHOCHAT  184s
SCHOCHAT  184s
SCN  184ne
SIFFRE  110ne
SLEEP  913s
SLEEPY  110n
SUPRACHIASMATIC  1111sw
TEMPERATURE  616n
TWENTYFIVE  810ne
ULTRADIAN  175s
ZEITGEBER  92se