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    Lawrence Hall of Science
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    In this outdoor activity, learners use only their senses to to find the extremes of several environmental variables or physical factors: wind, temperature, light, slope and moisture. Learners also...

    $1 - $5 per group Ages 6 - 14 30 to 45 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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    American Museum of Natural History
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    This activity helps learners understand how the angle of the Sun affects temperatures around the globe. After experimenting with a heat lamp and thermometers at differing angles, learners apply...

    $1 - $5 per group Ages 11 - 18 45 to 60 minutes
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    NASA
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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. Learners perform an...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    NASA
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    Through a series of simple body movements, learners gain insight into the relationship between time and astronomical motions of Earth (rotation about its axis, and orbit around the Sun), and also...

    $5 - $10 per group Ages 11 - adult 2 to 4 hours
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    The Center for Science Education @ Space Sciences Laboratory, UC Berkeley
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    In this activity, learners use an astrolabe to measure the altitude of objects. Learners will first practice taking measurements by measuring the altitude of trees and buildings. Then, learners...

    $1 - $5 per student Ages 6 - 14 1 to 4 weeks
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    Lawrence Hall of Science
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    In this outdoor activity, learners search for the warmest and coolest, windiest and calmest, wettest and driest, and brightest and darkest spots in an area. They also look for differences between...

    $10 - $20 per group Ages 8 - 18 45 to 60 minutes
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    The Exploratorium
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    This activity provides instructions for learners to create models of the Earth and then to model a "day" on Earth as well as modeling the seasons. Parent web site about ancient...

    $5 - $10 per group Ages 11 - 14 45 to 60 minutes
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    NASA
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    This lesson plan provides learners with two activities to explore the connections between events in their lives and the seasons of the year. Learners follow lists of instructions and create...

    $1 - $5 per student Ages 11 - 14 1 to 2 hours
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    NSBRI
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    In this activity (on page 6 of the PDF), learners plot the path of the sun's apparent movement across the sky on two days, with the second day occurring two or three months after the first....

    $1 - $5 per group Ages 8 - 14 1 to 7 days