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    NSBRI
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    In this activity about the relationship between food and energy (page 8 of PDF), learners estimate average daily baseline energy (Calorie) needs and energy needs for different levels of activity....

    free Ages 8 - 14 45 to 60 minutes
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    My Science Box
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    What does it mean to be alive? Is a cactus alive? Is a seed alive? Is the air we breathe alive? What are the necessary characteristics? To hook learners into the question, they are introduced to ...

    $1 - $5 per group Ages 11 - 14 1 to 2 hours
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    Arizona Science Center
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    In this activity, learners use beads, which represent amino acids, to create protein bracelets. Learners examine the relationship between amino acids and proteins. Learners also discover that...

    $5 - $10 per group Ages 8 - 14 45 to 60 minutes