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.

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

X
Y
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1# # # # # E # # # S L E E P Y # # E # #
2# # # # # # Y # # U L # # # # # # V # #
3R E B E G T I E Z M N E # # # # # A # #
4# V # # # # # L L A A # E # # # B C # #
5# I # # # # I C A L I # R P # # I I # #
6# F # # # G # R U A D # F # # T O R # #
7# Y # # H # # I N H A # F # A E L C # #
8# T # T # # # C N T R # I M N M O A # #
9# N # # N # # C A O F # S D E P G D # #
10# E # # A # # I C P N A O N # E I I # #
11# W # T I L # T R Y I G S # X R C A # #
12M T # A D A # C I H E T # O # A A N # #
13E # # H A E # R C N R # G # # T L # # #
14L # # C R N # A O U O E # # # U # # # #
15A # # O T I R U A # N I # # # R # # # #
16T # # H L P S L # O # # S # # E # # # #
17O # # C U # # # U # # # # E # # # # # #
18N # # S C N # S # # # # # # # # # # # #
19I # H A M S T E R S # # # # # # # # # #
20N # # # # # # # # # # # # # # # # # # #
Word X Y Direction
ARCTICCIRCLE  814n
BIOLOGICAL  175s
CAVE  184n
CIRCADIAN  184s
CIRCANNUAL  913n
ENDOGENOUS  167sw
EXOGENOUS  1610sw
EYE  83nw
HAMSTERS  319e
HYPOTHALAMUS  1012n
INFRADIAN  1111n
LIGHT  84sw
MELATONIN  112s
MENSTRUAL  168sw
NOISE  1013se
PINEAL  616n
SCHOCHAT  418n
SCHOCHAT  418n
SCN  418e
SIFFRE  139n
SLEEP  101se
SLEEPY  101e
SUPRACHIASMATIC  1111ne
TEMPERATURE  166s
TWENTYFIVE  212n
ULTRADIAN  517n
ZEITGEBER  83w