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    American Association for the Advancement of Science
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    In this online activity, learners can test their skills at finding constellations in the northern hemisphere's night sky. Learners can choose during which season to look, and then look for...

    free Ages 8 - 11 10 to 30 minutes
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    American Association for the Advancement of Science
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    In this lesson that includes hands-on activities and demonstrations, learners discover that it is the tilt of the Earth's axis (not its proximity to the sun) that causes the seasons. Learners...

    free Ages 11 - 14 45 to 60 minutes
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    Science Museum of Minnesota
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    This is an online simulation of how sound changes due to environment. How does place--like a cave, a pier, or a forest--affect certain sounds? Move the sound pieces around and change the location...

    free Ages 4 - 8 5 to 10 minutes
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    NASA
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    In this activity, learners train to increase muscular strength and improve upper and lower body coordination by performing the “bear crawl” and the "crab walk.” Learners perform the exercises...

    free Ages 8 - 14 1 to 4 weeks
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    NASA
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    In this activity, learners will train to improve lung, heart, and other muscle endurance as they walk a progressive, measured distance. Learners measure out a course according to specific distances...

    free Ages 8 - 14 1 to 4 weeks
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    Oregon Museum of Science and Industry
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    This activity is on page 3 (continued on page 2) of the pdf, part of the Simple Machines Discovery Box. In this fun activity, learners "create" a complex machine by simulating the parts...

    free Ages 4 - 6 10 to 30 minutes
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    National Park Service
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    In this online interactive, learners investigate fires, particularly the causes and behavior of forest fires, as well as how the National Park Service deals with fires. Learners modify conditions ...

    free Ages 6 - 14 5 to 10 minutes
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    Children's Museum Of Houston
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    In this activity, learners conduct an experiment by heating an aluminum can filled with water to investigate air pressure. Learners will be amazed at what happens to the can at the end of the...

    free Ages 8 - 14 5 to 10 minutes
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    Science Museum of Minnesota
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    In this interactive Quicktime computer game, learners use archaeological techniques and strategies to "dig up" a hidden image. The game has an easy and hard setting. This game is part of...

    free Ages 4 - 11 5 to 10 minutes
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    Twin Cities Public Television
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    In this online Flash game, learners test their engineering know-how, moving a collection of mechanical parts onto a board to make complete a system of parts that will move a ball from start to...

    free Ages 6 - 14 5 to 10 minutes

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