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.

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

X
Y
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1# # R # # # # # # # # # # # # # # # # #
2# # E # # # # # # # # # # # # # # # # #
3# # B # # T W E N T Y F I V E # # # # #
4# # E T # # # N I N O T A L E M # S C N
5Y # G H # # # # N A I D A R T L U # # #
6P # T G # # # # # # L A E N I P # # # #
7E # I I # # # # # # # # # # R S # # # #
8E Y E L C R I C C I T C R A U L # S # #
9L # Z L A U N N A C R I C O A # U # # #
10S U M A L A H T O P Y H N U # O # # # #
11I # N A I D A R F N I E R O N # # # # #
12F # # # # # # # # A G T # E I # # # H #
13F T A H C O H C S O S # G # # S # # A #
14R # # # # # # M D N # O # # # # E # M #
15E # # # # # A N E # X # # # # # # # S #
16# V # # # T E M P E R A T U R E # # T #
17# # A B I O L O G I C A L # # # # # E #
18# # # C I R C A D I A N # # # # # # R #
19# # # # # # # # # # # # # # # # # # S #
20# # # # # # # # # # # # # # # # # # # #
Word X Y Direction
ARCTICCIRCLE  148w
BIOLOGICAL  517e
CAVE  418nw
CIRCADIAN  418e
CIRCANNUAL  139w
ENDOGENOUS  716ne
EXOGENOUS  1016ne
EYE  38w
HAMSTERS  1912s
HYPOTHALAMUS  1210w
INFRADIAN  1111w
LIGHT  48n
MELATONIN  164w
MENSTRUAL  816ne
NOISE  1310se
PINEAL  166w
SCHOCHAT  913w
SCHOCHAT  913w
SCN  184e
SIFFRE  110s
SLEEP  110n
SLEEPY  110n
SUPRACHIASMATIC  1111sw
TEMPERATURE  616e
TWENTYFIVE  63e
ULTRADIAN  175w
ZEITGEBER  38n