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Why Doesn’t the Ocean Freeze?

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In this activity, learners explore how salt water freezes in comparison to fresh water.
1 cent - $1 per group Ages 6 - 14 1 to 2 hours

How Does Water Climb a Tree?

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In this activity, learners conduct an experiment to explore how water flows up from a tree's roots to its leafy crown.
$1 - $5 per student Ages 6 - 14 1 to 2 hours