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.

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

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2# N # # # R # # # # L # # S L E E P Y #
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8N L # P L # # A R C T I C C I R C L E #
9E E # O # # H # C I R C A N N U A L N #
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11O B # L A E N I P # I # E I R # # A O #
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13E R U T A R E P M E T # S E D # # D E #
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16# # # # # # G # # T H G I L N T # R U #
17# # # # # E # # # # # # # # A # I I S #
18# # # # B # # L A U R T S N E M # C # #
19# # # E # # # # N A I D A R T L U # # #
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Word X Y Direction
ARCTICCIRCLE  88e
BIOLOGICAL  110ne
CAVE  138s
CIRCADIAN  1818n
CIRCANNUAL  99e
ENDOGENOUS  198s
EXOGENOUS  113n
EYE  1013s
HAMSTERS  79ne
HYPOTHALAMUS  79se
INFRADIAN  158s
LIGHT  1416w
MELATONIN  210n
MENSTRUAL  1618w
NOISE  149s
PINEAL  911w
SCHOCHAT  1820w
SCHOCHAT  1820w
SCN  44w
SIFFRE  106nw
SLEEP  44s
SLEEPY  142e
SUPRACHIASMATIC  1111se
TEMPERATURE  1113w
TWENTYFIVE  116e
ULTRADIAN  1719w
ZEITGEBER  1013sw