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Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust.

1 cent - $1 per group Ages 8 - 11 5 to 10 minutes
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In this activity, learners will test soil content using their sample, some water and a container that seals.

1 cent - $1 per student Ages 4 - adult Under 5 minutes
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In this optics activity, learners explore how light bends and affects what we see.

1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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In this optics activity, learners use water to make a coin "appear" and "disappear." Use this activity to demonstrate how light refracts and introduce light as waves.

1 cent - $1 per student Ages 6 - 11 Under 5 minutes
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In this activity (p.26 of PDF), learners discover why mushrooms have spots. Learners use a balloon, toilet paper, and water to simulate what happens as mushrooms grow.

1 cent - $1 per group Ages 11 - 14 10 to 30 minutes
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In this hands-on botany activity, learners sprout vegetables in film canisters.

1 cent - $1 per student Ages 4 - 11 1 to 4 weeks
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In this optics activity, learners explore color by examining color dots through colored water and the light of a flashlight.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In this optics activity, learners make a lens and explore how the eye manipulates the light that enters it.

1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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In this activity, learners create a "mini sky" in a glass of water in a dark room.

1 cent - $1 per student Ages 6 - 14 Under 5 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 quick activity/demonstration about density, learners examine what happens when two cans of root beer--one diet and one regular--are placed in a large container of water.

1 cent - $1 per group Ages 4 - 14 Under 5 minutes
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In this "Sid the Science Kid" activity, learners get their hands dirty by playing in a container of soil. Then they compare the effectiveness of cleaning their hands with just a paper towel vs.

1 cent - $1 per group Ages 4 - 6 10 to 30 minutes
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In this activity about sea otters, learners make their own "otter whiskers" and use them to find objects underwater.

1 cent - $1 per student Ages 4 - 11 5 to 10 minutes
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In this activity, learners cut out and assemble wheels to explore how variations in fish body structures (mouth shape/position/teeth, body shape, tail shape, and coloration patterns) allow fish to sur

1 cent - $1 per group Ages 4 - adult 10 to 30 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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Learners investigate the concept of humidity by using a dry and wet sponge as a model. They determine a model for 100% humidity, a sponge saturated with water.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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In this activity (on pages 13-16 of the PDF) learners investigate three mystery samples to see which one contains life. The three samples are sand, sand and yeast, and sand and antacid.

1 cent - $1 per group Ages 4 - 14 30 to 45 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, learners explore the concept of permeability to better understand why amphibians are extremely sensitive to pollution.

1 cent - $1 per group Ages 4 - 14 4 to 24 hours
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In this group activity, learners consider environmental conditions—temperature, presence of water, atmosphere, sunlight, and chemical composition—on planets and moons in our solar system to determine

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