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.

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

X
Y
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1# # # # # # # # # # # # # # # # # # M #
2# # # # # # # # # # # R E B E G T I E Z
3# # # # # # # # # # # # # # # # # # L #
4# # # C I R C A D I A N # # # # # # A #
5# # # B I O L O G I C A L I G H T # T #
6# # # # # T E M P E R A T U R E # M O #
7Y # # # # # A N O I S E # # # X # E N #
8P # # # # # # M D # # # # # # O # N I #
9E # # E R F F I S O # # # # # G N S N #
10E # # # # # # # # A G # # # # E A T # #
11L # N A I D A R F N I E # # V N I R # #
12S U M A L A H T O P Y H N A # O D U # #
13# # # L A U N N A C R I C O # U A A # #
14E Y E L C R I C C I T C R A U S R L # #
15# S R E T S M A H # # # # # R S T # # #
16T W E N T Y F I V E L A E N I P L N # #
17# # # # # # # # # # # # # # # # U C # #
18# # # # # # # # # # T A H C O H C S # #
19# # # # # # # # # # # # # # # # # # # #
20# # # # # # # # # # # # # # # # # # # #
Word X Y Direction
ARCTICCIRCLE  1414w
BIOLOGICAL  55e
CAVE  1313ne
CIRCADIAN  44e
CIRCANNUAL  1313w
ENDOGENOUS  76se
EXOGENOUS  166s
EYE  314w
HAMSTERS  915w
HYPOTHALAMUS  1212w
INFRADIAN  1111w
LIGHT  135e
MELATONIN  191s
MENSTRUAL  186s
NOISE  87e
PINEAL  1616w
SCHOCHAT  1818w
SCHOCHAT  1818w
SCN  1818n
SIFFRE  99w
SLEEP  112n
SLEEPY  112n
SUPRACHIASMATIC  1111nw
TEMPERATURE  66e
TWENTYFIVE  116e
ULTRADIAN  1717n
ZEITGEBER  192w