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Learners test two jars containing soil, one covered and one open, for changes in temperature. After placing the jars in the Sun, learners discover that the covered jar cools down more slowly.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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Learners investigate the concept of humidity by using a dry and wet sponge as a model. They determine a model for 100% humidity, a sponge saturated with water.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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Learners test two jars, one containing plain air and one containing carbon dioxide gas, to see their reactions to temperature changes.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater.

1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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In this activity, learners discuss and investigate how cameras, telescopes, and their own eyes use light in similar ways.

1 cent - $1 per student Ages 11 - 14 45 to 60 minutes
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Space telescopes can offer us better, clearer views of the universe (and of our own planet) than Earth-based telescopes can, but getting these large, delicate pieces of equipment into orbit is tricky.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In "Exploring the Universe: Exoplanet Transits," participants simulate one of the methods scientists use to discover planets orbiting distant stars.

1 cent - $1 per student Ages 6 - 14 5 to 10 minutes
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In this activity, learners make pykrete by freezing a mixture of water and a material like cotton wool, grass, hair, shredded paper, wood chips, or sawdust.

1 cent - $1 per student Ages 4 - adult 4 to 24 hours
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In this activity (located on page 6 of the PDF), learners explore the ways people access water in their homes.

1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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In this activity, learners build a 1:140 "scale model" of NASA's X-33 Reusable Launch Vehicle (RLV) Technology Demonstrator, and investigate how the model dimensions compare to the real vehicle.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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In this oceanography and data collection activity, learners cast real time sea state conditions using buoys from NOAA's National Data Buoy Center.

1 cent - $1 per student Ages 14 - 18 1 to 2 hours
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In this indoor and/or outdoor activity, learners make an anemometer (an instrument to measure wind speed) out of a protractor, a ping pong ball and a length of thread or fishing line.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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"Exploring the Universe: Filtered Light" demonstrates how scientists can use telescopes and other tools to capture and filter different energies of light to study the universe.

1 cent - $1 per student Ages 6 - 14 5 to 10 minutes
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In this pencil and paper activity, learners work in pairs and simulate how astronomical spacecraft and computers create images of objects in space.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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This activity (located on page 3 of the PDF under GPS: Glaciers Activity) is a full inquiry investigation into the forces of gravity and air pressure.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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In this activity, learners discover that one way to cool an object in the presence of a heat source is to increase the distance from it or change the angle at which it is faced.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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In this activity (page 1 of the PDF under SciGirls Activity: Water Slides), learners will whip up some suds with a cup of water and a tablespoon of dish soap until the bubbles are stiff enough to star

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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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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Learners create a small explosion by collecting hydrogen and oxygen gas together and squeezing them into a flame.

1 cent - $1 per group Ages 14 - adult Under 5 minutes
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In this tabletop board game, players will represent a team of scientists and engineers sending a spacecraft on a mission to space.

1 cent - $1 per group Ages 4 - adult 30 to 45 minutes