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In this activity, learners model estuaries, artificially enriching both fresh and salt water samples with different amounts of nutrients and observing the growth of algae over several weeks.

$5 - $10 per group Ages 14 - 18 1 to 4 weeks
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In this plant science activity, learners role play as vegetables and weeds competing for nutrients.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes