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In this activity (on pages 10-15), learners investigate starch in human diets and how plants make starch (carbohydrates) to use as their food source.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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Learners add drops of alginate solution to a solution of calcium chloride. The alginate does not mix with the calcium chloride, but forms soft gel beads.

per group Ages 8 - adult 5 to 10 minutes