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