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    National Optical Astronomy Observatory
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    This is a classic exercise for visualizing the scale of the Solar System. Both the relative size and spacing of the planets are demonstrated in this outdoor exercise, using a mere peppercorn to...

    1 cent - $1 per group Ages 6 - adult 45 to 60 minutes
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    Lawrence Hall of Science
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    In this outdoor activity and observation game, learners hunt for a variety of textures, colors, odors and evidence of organisms in the activity site. The activity can be done with same age or mixed...

    $5 - $10 per group Ages 4 - adult 30 to 45 minutes
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    Lawrence Hall of Science
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    In this activity, learners make their own Sun tracker to explore how ancient civilizations around the world studied the Sun. After creating the tracker with simple materials, learners measure the...

    $1 - $5 per student Ages 6 - adult 10 to 30 minutes
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    Lawrence Hall of Science
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    Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small. In this outdoor activity, learners will build their own net in order to collect and observe their...

    $10 - $20 per group Ages 8 - adult 10 to 30 minutes
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    Lawrence Hall of Science
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    How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake? In this outdoor activity, learners will make their own Secchi disk...

    $10 - $20 per group Ages 8 - adult 10 to 30 minutes