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How Quick Are Your Responses?

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In this activity (on page 134 of the PDF), learners explore reaction time.
1 cent - $1 per group Ages 8 - 18 1 to 2 hours

Living Clocks

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In this activity about daily rhythms (on page 17 of the PDF), learners will explore circadian patterns in humans, animals and plants.
$1 - $5 per group Ages 8 - 14 1 to 7 days