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Learners will do an experiment to determine which type of paper is strongest while focusing on variables and collecting data.

1 cent - $1 per group Ages 6 - adult 30 to 45 minutes
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Learners add acid rain (nitric acid) to two cups that represent lakes. One cup contains limestone gravel and the other contains granite gravel.

1 cent - $1 per group Ages 14 - adult 5 to 10 minutes