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 | Q | U | C | O | Z | L | H | D | F | F | S | L | E | E | P | B | W | Y | D |
| A | Z | R | C | M | G | F | G | N | D | L | U | R | Y | E | W | D | X | R | O |
| C | C | E | B | Z | D | R | P | G | E | N | M | Z | E | D | X | Z | K | K | O |
| G | S | B | C | B | Z | K | A | E | J | A | A | L | L | M | D | B | J | Z | T |
| N | N | E | I | I | M | G | P | R | K | I | L | A | C | E | B | S | B | N | E |
| P | C | G | R | O | T | Y | W | F | K | D | A | U | R | N | L | R | E | I | A |
| O | F | T | C | L | E | A | K | F | O | A | H | N | I | S | R | E | R | N | P |
| W | I | I | A | O | M | N | M | I | G | R | T | N | C | T | A | T | X | O | Y |
| S | Z | E | D | G | P | O | D | S | G | F | O | A | C | R | X | S | P | T | L |
| S | O | Z | I | I | E | I | O | O | A | N | P | C | I | U | R | M | O | A | K |
| P | A | Y | A | C | R | S | G | Q | G | I | Y | R | T | A | L | A | T | L | U |
| Z | T | P | N | A | A | E | C | L | R | E | H | I | C | L | A | H | A | E | Z |
| X | Y | O | Y | L | T | S | I | I | L | I | N | C | R | Z | E | Q | H | M | D |
| C | Y | P | I | I | U | P | K | X | U | P | A | O | A | T | N | I | C | A | D |
| A | S | G | U | D | R | V | B | I | R | V | D | B | U | R | I | X | O | D | Q |
| I | H | Q | N | F | E | X | O | G | E | N | O | U | S | S | P | L | H | T | F |
| T | X | T | Z | I | E | L | N | N | A | I | D | A | R | T | L | U | C | L | N |
| L | S | E | V | Y | V | P | Y | C | N | T | A | H | C | O | H | C | S | V | Z |
| I | O | B | H | S | E | S | E | Y | T | J | Y | S | D | O | V | E | C | T | C |
| T | W | E | N | T | Y | F | I | V | E | Q | M | B | D | E | A | K | N | Z | K |
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