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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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In this activity, learners design a flag for a chosen or assigned planet. The instructions include information about flags on Earth, and a list of flag references.

1 cent - $1 per group Ages 6 - adult 10 to 30 minutes
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In this activity, learners use an old CD to construct a spectroscope, a device that separates light into its component colors.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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In this demonstration, learners observe the effects of density and pressure. A "diver" constructed out of a piece of straw and Blu-Tack will bob inside a bottle filled with water.

1 cent - $1 per group Ages 4 - adult Under 5 minutes
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In this activity (23rd on the page), learners conduct an experiment to examine memory and learning.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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In this activity, learners experiment and observe how the color of materials that cover the Earth affects the amounts of sunlight our planet absorbs.

1 cent - $1 per group Ages 8 - 18 30 to 45 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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This activity is about collecting and analyzing DNA as part of a criminal investigation.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors.

1 cent - $1 per group Ages 8 - 18 5 to 10 minutes
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In this optics activity, learners examine how a transparent material such as glass or water can actually reflect light better than any mirror.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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In this activity (1st on the page), learners find their blind spot--the area on the retina without receptors that respond to light.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly.

1 cent - $1 per group Ages 8 - 18 Under 5 minutes
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In this activity, learners explore how air warms when it condenses water vapor or makes clouds.

1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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In this demonstration about momentum, use physics to distinguish between a hard-boiled egg and a raw egg without cracking them open.

1 cent - $1 per group Ages 4 - adult Under 5 minutes
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In this activity (posted on March 27, 2011), learners follow the steps to construct a mini zoetrope, a device that produces an illusion of action from a rapid succession of static pictures.

1 cent - $1 per student Ages 6 - 18 1 to 2 hours
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With a coffee filter, a black marker, and a cup of water, discover the secret colors hidden in black ink.

1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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In this physics demonstration, learners are challenged to break a raw egg just by squeezing it. Learners will be shocked by their inability to complete the deceivingly simple challenge.

1 cent - $1 per group Ages 4 - adult Under 5 minutes
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In this science/art activity, learners create an insignia or emblem for a planet exploration mission.

1 cent - $1 per group Ages 6 - 18 45 to 60 minutes
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In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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In this activity about neuron/target muscle recognition (page 44 of the PDF), learners arranged in two rows facing away from each other use string to simulate neural development.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes