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

X
Y
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1E # # # # # Y P E E L S I F F R E # # #
2# V # # # # # # T # # U L # # # # # # #
3# # A # # # # # A # N M # E Y E # # # #
4H # # C B # # # H # A A L L E # # # # #
5A # # I I # # # C # I L A C # P # # # #
6M # N R O T # # O # D A U R # # # # # #
7S # I C L E A # H # A H N I # # # # # #
8T # N A O M N M C # R T N C # # # R # #
9E # O D G P E D S # F O A C # # N E # #
10R # T I I E # N O A N P C I # # A B # #
11S # A A C R V # S G I Y R T # L I E # #
12# # L N A A # I # T E H I C # A D G # #
13# # E # L T # # F X R N C R # E A T # #
14# # M # I U # # O Y O U O A # N R I # #
15# # # # G R # G # I T # A U R I T E # #
16# # # # H E E # S # # N # L S P L Z # #
17# # # # T N # E # # # # E # # # U # # #
18# # # # O # # # # # # # # W # # # S C N
19# # # U # # # # # # # # # # T # # # # #
20# # S # # # # # # # # # # # # # # # # #
Word X Y Direction
ARCTICCIRCLE  1414n
BIOLOGICAL  55s
CAVE  44nw
CIRCADIAN  44s
CIRCANNUAL  1313n
ENDOGENOUS  67se
EXOGENOUS  1112sw
EYE  143e
HAMSTERS  14s
HYPOTHALAMUS  1212n
INFRADIAN  1111n
LIGHT  513s
MELATONIN  314n
MENSTRUAL  68se
NOISE  1213sw
PINEAL  1616n
SCHOCHAT  99n
SCHOCHAT  99n
SCN  1818e
SIFFRE  121e
SLEEP  121se
SLEEPY  121w
SUPRACHIASMATIC  1111nw
TEMPERATURE  66s
TWENTYFIVE  1519nw
ULTRADIAN  1717n
ZEITGEBER  1815n