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This warm weather activity introduces learners to the impact trees have on blocking the sun's heat and reducing temperature on the Earth's surface.

1 cent - $1 per student Ages 4 - 14 2 to 4 hours
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In some parts of the world, lakes freeze during winter. In this activity learners will explore water’s unique properties of freezing and melting, and how these relate to density and temperature.

$5 - $10 per group Ages 8 - adult 10 to 30 minutes
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In this simulation activity, learners observe what can happen when ocean waves churn up water and oil from an oil spill.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes