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This is an activity (located on page 131 of the PDF) related to sleep and circadian rhythms as well as space travel.

free Ages 8 - 18 45 to 60 minutes
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In this activity, learners make "totally tubular" forms of carbon. Learners use chicken wire to build macro models of carbon nanotubes.

$10 - $20 per group Ages 11 - 18 10 to 30 minutes
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In this geology activity, learners create a model using a mixture of salt and sand inside a CD case. When the case is tilted or inverted, the mixture dramatically sorts into a layered pattern.

$5 - $10 per group Ages 11 - 18 1 to 2 hours
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In this activity about the brain and sleep (on page 138 of the PDF), learners measure their resting breathing rates. Learners will discover that breathing frequencies vary amongst individuals.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships.

1 cent - $1 per group Ages 8 - adult 30 to 45 minutes
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In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners create a mind and math puzzle that requires a three-dimensional solution.

$1 - $5 per student Ages 8 - 18 1 to 2 hours
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This lab activity has learners create a pendulum with a one-second period.

$1 - $5 per student Ages 11 - adult 45 to 60 minutes
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In this activity, learners build inexpensive pulley assemblies from pulley wheels used for sliding screen door replacement or from clothesline spreaders.

$10 - $20 per group Ages 11 - 18 1 to 2 hours
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Groups of learners are provided with a generic car base and an egg. Their mission: design a device/enclosure to protect the egg on or in the car as it rolls down a ramp with increasing slopes.

Over $20 per group Ages 11 - 18 1 to 2 hours
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In this activity, learners walk the sides and interior angles of various polygons drawn on the playground. As they do so, learners practice rotating clockwise 180° and 360°.

1 cent - $1 per group Ages 11 - 18 5 to 10 minutes
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In this activity, learners work in groups to determine the mass and volume of four samples: glass marbles, steel washers or nuts, pieces of pine wood, and pieces of PVC pipe.

$10 - $20 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners investigate various appliances and electronics, discovering how much energy each uses and how much carbon dioxide (CO2) is released to produce that energy.

Over $20 per group Ages 11 - 18 1 to 2 hours
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In this activity (on pages 41-47 of PDF), learners explore tesselating geometric patterns (repeated shapes, similar to the art of M.C. Escher).

1 cent - $1 per student Ages 4 - adult 45 to 60 minutes
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In this activity (on page 134 of the PDF), learners explore reaction time.

1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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In this activity, "write" a secret message in genetic code as beads on a string.

$1 - $5 per student Ages 11 - 18 30 to 45 minutes
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In this seismic simulation, learners play a "who-dunnit" game to explore earthquakes.

free Ages 11 - adult 1 to 2 hours
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In this activity, learners explore how the area of Arctic sea ice has changed over recent years. First, learners graph the area of Arctic sea ice over time from 1979 to 2007.

free Ages 11 - 18 45 to 60 minutes
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In this classic hands-on activity, learners estimate the length of a molecule by floating a fatty acid (oleic acid) on water.

$1 - $5 per student Ages 11 - 18 45 to 60 minutes
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In this activity, learners build mini-basketball courts and explore the laws of physics. Learners discover that everything you throw or shoot on earth travels in a parabola.

$10 - $20 per student Ages 6 - 18 30 to 45 minutes