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As a model of acid rain, learners water plants with three different solutions: water only, vinegar only, vinegar-water mixture.

$10 - $20 per group Ages 8 - 14 1 to 4 weeks
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In this activity on page 2 of the PDF, learners discover how color changes can help scientists distinguish between acids and bases.

$10 - $20 per student Ages 6 - 11 10 to 30 minutes
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In this activity on page 3 of the PDF, learners discover how science and Halloween are fun companions as they make paper bleed.

$10 - $20 per group Ages 6 - 14 5 to 10 minutes
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In this activity, learners perform an experiment to find out what determines a flower's color.

$10 - $20 per group Ages 11 - 14 45 to 60 minutes