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.

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

X
Y
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1# Z E I T G E B E R # # # # # # # # # #
2# # # # # N # # # # # # # # # # # # # #
3# # L # C # # # E # # # # # # # # # # #
4# # A S I F F R E S # # # # # # # # # #
5# # U C U L T R A D I A N # # # # # # #
6# # R H # P # # N I N O T A L E M # # #
7# # T O # I R # # T W E N T Y F I V E #
8# # S C # N # A R C T I C C I R C L E #
9S # N H T E V A C E # I # # N # L L N #
10S U E A H A E # M H R # # # F # A A D #
11U # M T G L Y P # C I # # # R # C U O #
12O # # A I # E # A # # A # # A # I N G #
13N # # # L R # D P E E L S # D # G N E #
14E # # # A A I # # # # # L M I # O A N #
15G # # T # A H # # # # # E # A # L C O #
16O # U # N # # T # # # # E # N T O R U #
17X R # # # # # # O # # # P # # # I I S #
18E # # # # # # # # P # # Y # # # B C # #
19# # # # # # # # # # Y # # # # # # # # #
20# # # # # # # # # # # H A M S T E R S #
Word X Y Direction
ARCTICCIRCLE  88e
BIOLOGICAL  1717n
CAVE  99w
CIRCADIAN  138sw
CIRCANNUAL  1818n
ENDOGENOUS  198s
EXOGENOUS  118n
EYE  712n
HAMSTERS  1220e
HYPOTHALAMUS  1220nw
INFRADIAN  158s
LIGHT  513n
MELATONIN  176w
MENSTRUAL  311n
NOISE  137nw
PINEAL  66s
SCHOCHAT  44s
SCHOCHAT  44s
SCN  44ne
SIFFRE  44e
SLEEP  1313w
SLEEPY  1313s
SUPRACHIASMATIC  1111se
TEMPERATURE  118sw
TWENTYFIVE  107e
ULTRADIAN  55e
ZEITGEBER  11e