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.

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

X
Y
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1# # # # # # Y P E E L S # # # # # # # #
2# # # # # # # # # # # U # # # # # # # #
3# E V I F Y T N E W T M # E Y E # # # #
4E V A C B # # O E # # A L L I G H T # #
5# # # I I # # I R # # L A C # # # # # #
6# # # R O T # S F # # A U R # # # # # #
7# # # C L E A E F # # H N I # # # # # #
8# M # A O M N M I # # T N C # # # # # #
9# E # D G P E D S # # O A C # # # S # #
10# L # I I E # N O A # P C I # # # R # #
11# A # A C R # # S G I Y R T # L # E # #
12# T # N A A # # # T E H I C # A # T # #
13# O # # L T # # # X R N C R # E # S # #
14# N # # # U # # O # F U O A # N # M # #
15# I # # # R # G # R # # A U R I # A # #
16# N # # # E E # A # # # # L S P # H # N
17# # # # # N # D N A I D A R T L U # C #
18# # # # O # I # # # T A H C O H C S # #
19# # # U # A # # # # # # # # # # # # # #
20# # S # N # # # # Z E I T G E B E R # #
Word X Y Direction
ARCTICCIRCLE  1414n
BIOLOGICAL  55s
CAVE  44w
CIRCADIAN  44s
CIRCANNUAL  1313n
ENDOGENOUS  67se
EXOGENOUS  1112sw
EYE  143e
HAMSTERS  1816n
HYPOTHALAMUS  1212n
INFRADIAN  1312sw
LIGHT  144e
MELATONIN  28s
MENSTRUAL  68se
NOISE  83s
PINEAL  1616n
SCHOCHAT  1818w
SCHOCHAT  1818w
SCN  1818ne
SIFFRE  99n
SLEEP  121w
SLEEPY  121w
SUPRACHIASMATIC  1111nw
TEMPERATURE  66s
TWENTYFIVE  113w
ULTRADIAN  1717w
ZEITGEBER  1120e