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This activity (located on page 8 of the PDF) introduces learners to the concept of Non-point Source Pollution--what happens when rain washes garbage and other pollutants into rivers and lakes.

$5 - $10 per group Ages 6 - 11 5 to 10 minutes
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In this activity, learners create a map of a hidden surface using a "sounding stick" -- a technique similar to how underwater maps were once made.

Over $20 per group Ages 4 - adult 10 to 30 minutes
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In this two-part activity, learners work in pairs to examine the four basic stages of a turbine engine.

Over $20 per group Ages 11 - 14 45 to 60 minutes
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In this activity, learners set up an experiment to investigate the effects of hot air on the path of a laser beam.

$1 - $5 per group Ages 14 - 18 45 to 60 minutes
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In this activity, learners model, on a human-sized board game, how changes in water temperature may affect fish distributions and, ultimately, fisheries.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes
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This demonstration/activity helps learners understand why higher elevations are not always warm simply because "hot air rises." Learners use a tire pump to increase the pressure and temperature inside

$1 - $5 per group Ages 8 - 18 10 to 30 minutes
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In this activity, learners explore how the shapes, sizes, and distances of land masses appear differently on two different models of Earth: an icosahedron and a flat map.

1 cent - $1 per group Ages 11 - 18 30 to 45 minutes
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Learners make a refrigerator that works without electricity. The pot-in-pot refrigerator works by evaporation: a layer of sand is placed between two terra cotta pots and thoroughly soaked with water.

$1 - $5 per group Ages 11 - 14 45 to 60 minutes
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In this activity on page 7 of the PDF, learners investigate the solubility of gas in water at different temperatures. This experiment will help learners determine if temperature affects solubility.

$1 - $5 per student Ages 8 - 14 45 to 60 minutes
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This activity provides a hands-on experience with a scale model, a relatively high viscosity fluid, and feeding behaviors.

$5 - $10 per group Ages 8 - 18 30 to 45 minutes
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In this activity, learners simulate the behavior of the atmosphere.

free Ages 8 - 14 10 to 30 minutes
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Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models.

1 cent - $1 per group Ages 8 - 11 45 to 60 minutes
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In this activity, learners practice the steps involved in a scientific investigation while learning why ice formations on land (not those on water) will cause a rise in sea level upon melting.

$5 - $10 per group Ages 8 - 14 2 to 4 hours
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In this activity, learners use maps to locate the Northwest Coastal region.

$1 - $5 per group Ages 4 - 11 30 to 45 minutes
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In this guided discussion activity, learners watch a video about Central Africa's Lower Congo River, one of the most biologically diverse rivers in the world.

free Ages 11 - adult 10 to 30 minutes
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The goal of this activity is to design the fastest sailboat or one that carries the most treasure.

$5 - $10 per group Ages 6 - 18 10 to 30 minutes
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Educator Amy O'Donnell from the American Museum of Natural History guides learners to create a diorama of a coral reef.

$5 - $10 per student Ages 6 - 14 1 to 2 hours
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In this activity, learners simulate Otto von Guericke's famous Magdeburg Hemispheres experiment.

$10 - $20 per group Ages 11 - 18 10 to 30 minutes
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This activity (on page 2 of the PDF under SciGirls Activity: Earthquakes) is a full inquiry investigation into aerial imagery.

free Ages 8 - 14 45 to 60 minutes
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In this activity, learners construct a simple electrolysis device. With this device, learners can decompose water into its elemental components: hydrogen and oxygen gas.

$5 - $10 per student Ages 14 - 18 4 to 24 hours