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In this activity, learners explore in what ways the shape of the land and the pull of gravity influence how water moves over Earth.

1 cent - $1 per student Ages 4 - 11 5 to 10 minutes

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In this nanoscience activity, learners discover that it's easy to pour water out of a regular-sized cup, but not out of a miniature cup.

$5 - $10 per group Ages 4 - adult 5 to 10 minutes