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In this experiment, learners examine how pressure affects water flow. In small groups, learners work with water and a soda bottle, and then relate their findings to pressure in the deep ocean.

1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In this math activity, based on the research of famed astronomer Frank Drake, learners calculate the possibilities of finding intelligent life elsewhere in the universe besides Earth.

1 cent - $1 per group Ages 11 - adult 45 to 60 minutes
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In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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In this matching game, learners study the limits of life on Earth to see what other places in the solar system might sustain microbial life.

1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners analyze a fictionalized report of life on Mars, based on a real NASA satellite photo, and explore how to separate scientific fact from fiction.

1 cent - $1 per student Ages 11 - adult 30 to 45 minutes
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In this simulation, learners explore how ocean currents spread all kinds of pollution—including oil spills, sewage, pesticides and factory waste—far beyond where the pollution originates.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this activity about humans and space travel (page 1 of PDF), learners compare and contrast the behavior of a water-filled plastic bag, both outside and inside of a container of water.

1 cent - $1 per group Ages 6 - 11 45 to 60 minutes
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In this art-related activity, learners make a coin rubbing—a process similar to what archeologists may do with ancient artifacts. This activity can be used in connection with a history or art lesson.

1 cent - $1 per group Ages 6 - 11 10 to 30 minutes
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In this activity, learners use a flashlight, a glass of water, and some milk to examine why the sky is blue and sunsets are red.

1 cent - $1 per group Ages 11 - 18 5 to 10 minutes
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This activity (located on page 3 of the PDF) is a full inquiry investigation into mapping the underground “plumbing” of geysers.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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What causes frost to form on the outside of a cold container? In this activity, learners discover that liquid water can change states and freeze to become ice.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners will experiment with different materials that can melt and change ice.

1 cent - $1 per student Ages 4 - 6 10 to 30 minutes
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In this activity, learners make an equatorial sundial, which is simple to construct and teaches fundamental astronomical concepts. Learners use the provided template and a straw to build the sundial.

1 cent - $1 per group Ages 11 - 18 2 to 4 hours
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In this hands-on and feet-on excursion, learners take a science walk to visualize the planet's immense size and numerous structures, without the usual scale and ratio dimensions found in most textbook

1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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In this technology activity, learners explore digital imaging and pixels. Learners "transmit" an image to a partner by creating an image on grid paper.

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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In this two-part activity, learners map a navigation plan to get from Earth to Mars and back. In activity one, learners represent the orbital paths of Earth through dance and dramatic movement.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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In this two-part activity, learners explore the Earth and Sun's positions in relation to the constellations of the ecliptic with a small model.

1 cent - $1 per group Ages 4 - 18 1 to 2 hours
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Coins are everyday objects which tell a lot about the people who use them.

1 cent - $1 per student Ages 6 - 14 10 to 30 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