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In this activity on page 5 of the PDF (Plants—The Green Machines), learners use chromatography to separate and identify pigments within various leaves.

$1 - $5 per student Ages 8 - 14 1 to 2 hours
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In this activity, learners observe the effect of transpiration as water is moved from the ground to the atmosphere.

1 cent - $1 per group Ages 6 - 14 2 to 4 hours