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