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This guided inquiry three-part activity engages learners in thinking about the mechanism of natural selection through data collection and pattern recognition.

$5 - $10 per group Ages 11 - 18 1 to 2 hours
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In this activity (on pages 19-24 of PDF), learners soak chicken bones or eggshells in vinegar for several days.

1 cent - $1 per student Ages 8 - 14 1 to 4 weeks
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This Exploratorium activity explores size and scale. Through four levels of screen sizes, learners can sort out objects of different sizes.

$1 - $5 per student Ages 6 - 14 5 to 10 minutes
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In this activity, learners discuss how life is defined and conduct a simple experiment, looking for signs of life in three different “soil” samples.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this outdoor activity, learners use only their senses to to find the extremes of several environmental variables or physical factors: wind, temperature, light, slope and moisture.

$1 - $5 per group Ages 6 - 14 30 to 45 minutes
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In this activity, learners are introduced to tree rings by examining a cross section of a tree, also known as a “tree cookie.” They discover how tree age can be determined by studying the rings and ho

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors.

Over $20 per group Ages 4 - 14 10 to 30 minutes
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In this activity with several mini experiments, learners explore the chemistry that helps scientists learn about the environment and how they can help save it.

$1 - $5 per group Ages 8 - 14 4 to 24 hours
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In this activity, learners design, build and test wind turbines. Learners go through the design process and use the scientific method to test important blade variables.

Over $20 per group Ages 8 - 18 2 to 4 hours
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This activity was designed for blind learners, but all types of learners can explore means of physically separating a mixture using dissolving, filtration, and evaporation.

$1 - $5 per group Ages 11 - 18 10 to 30 minutes
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Just like birds, some dinosaurs had air-filled (pneumatic) bones, which made the dinosaurs' skeletons lighter.

$1 - $5 Ages 8 - 18 1 to 7 days
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In this activity, learners will develop a method to test five similar-looking powders (baking soda, baking powder, cream of tartar, detergent, and cornstarch) with four test liquids (water, vinegar, i

$1 - $5 per group Ages 6 - 14 45 to 60 minutes
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In this activity, learners work in teams build and launch rubberband-powered foam rockets.

$10 - $20 per group Ages 8 - 18 1 to 2 hours
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Everybody loves boomerangs! In this activity about force and motion, the learners will experiment with boomerangs and explore how they work. This is a great activity to get learners up and moving.

$1 - $5 per student Ages 4 - 8 10 to 30 minutes
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In this activity, learners mix several sugar solutions to investigate the property of density. Each sugar solution has a different density and color of the rainbow.

$1 - $5 per group Ages 8 - 14 30 to 45 minutes
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This Exploratorium activity can be used in many contexts because geysers are great opportunities for learning about heat and temperature changes as well as geological/space science phenomena.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners use plastic water bottles, wood, and water to build an inexpensive and portable tool to demonstrate one atmosphere of pressure at sea level.

$1 - $5 per student Ages 11 - 18 45 to 60 minutes
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In this introductory activity and demonstration, learners are introduced to the concept that different substances react chemically in characteristic ways.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this web-based activity, learners try to figure out who in an online chat room has their matching puzzle piece.

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up).

Over $20 per group Ages 4 - 14 10 to 30 minutes