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.

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

X
Y
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1# # R E B E G T I E Z S I F F R E # # #
2# # # N A I D A R T L U L # # # B # # #
3# # # L A U R T S N E M # E # # I # # #
4# # # C # # # # # # # A # # E # O # # #
5# # S I I # # T H G I L # # # P L # # #
6N # U R # T E M P E R A T U R E O # # #
7I # O C Y # A # # # # H # # # X G # # #
8N # N A P # # M # # # T # # # O I # # #
9O # E D E # # # S # # O # # # G C # # #
10T # G I E # # # # A # P E N # E A # # #
11A # O A L # # # # # I Y V A # N L T # #
12L # D N S R E T S M A H A I # O # A # #
13E # N L A U N N A C R I C D # U # H # #
14M # E L C R I C C I T C R A # S # C # #
15# Y # # # # # # # # # # # R R # # O # #
16E # # # # # # # # # # # # F # P # H # #
17P I N E A L # # # E S I O N # # U C # #
18# # # # # # T W E N T Y F I V E # S C N
19# # # # # # # # # # # # # # # # # # # #
20# # # # # # # # # # # # # # # # # # # #
Word X Y Direction
ARCTICCIRCLE  1414w
BIOLOGICAL  173s
CAVE  1313n
CIRCADIAN  44s
CIRCANNUAL  1313w
ENDOGENOUS  314n
EXOGENOUS  166s
EYE  314sw
HAMSTERS  1212w
HYPOTHALAMUS  1212n
INFRADIAN  1418n
LIGHT  125w
MELATONIN  114n
MENSTRUAL  123w
NOISE  1417w
PINEAL  117e
SCHOCHAT  1818n
SCHOCHAT  1818n
SCN  1818e
SIFFRE  121e
SLEEP  121se
SLEEPY  512n
SUPRACHIASMATIC  1111nw
TEMPERATURE  66e
TWENTYFIVE  718e
ULTRADIAN  122w
ZEITGEBER  101w