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In this physics activity (page 3 of the PDF), learners will move a load using a lever of each of the 3 classes. They will explore the differences between these classes and which are more effective.

$1 - $5 per group Ages 14 - 18 10 to 30 minutes
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In this activity, learners explore the magnetic field of a bar magnet as an introduction to understanding Earth's magnetic field. First, learners explore and play with magnets and compasses.

$10 - $20 per group Ages 8 - 18 10 to 30 minutes
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This is an activity about acid-base reactions using eggs and vinegar. Learners place eggs inside a container of vinegar and leave to soak overnight.

1 cent - $1 per group Ages 11 - 18 10 to 30 minutes
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Learners will construct a model of a heart valve using a film canister, a piece of masking tape, and a piece of paper.

1 cent - $1 per group Ages 4 - adult 10 to 30 minutes
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Learners will explore the chemistry of mucous and its importance to our health by following a process to make their own replica "snot." The activity includes a time and age recommendation, a materials

$1 - $5 per group Ages 6 - adult 10 to 30 minutes
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In this activity, learners experiment with hydrogen peroxide, vinegar, yeast, and baking soda to produce hot and cold reactions. Use this activity to demonstrate exothermic and endothermic reactions.

$5 - $10 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners use candy pieces and a cookie to make an accurate model of the Sun they can eat. Parts of the delicious model include solar granules, sunspots, and solar prominences.

$1 - $5 per student Ages 6 - adult 10 to 30 minutes
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In this activity, learners build a Wilberforce Pendulum, a special coupled pendulum in which energy is transferred between two modes of vibration, longitudinal ("bounce') and torsional ("twist"), on a

$10 - $20 per group Ages 11 - 18 10 to 30 minutes
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This is part 1 of the three-part "Crayon Rock Cycle" activity. In this activity, learners explore how sedimentary rocks form.

$5 - $10 per student Ages 4 - adult 10 to 30 minutes
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In this activity, learners model a population of deer and see how the number of deer changes over time.

free Ages 11 - 18 10 to 30 minutes
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In this activity, learners place cards featuring biological structures in order by their relative size from largest to smallest.

1 cent - $1 per group Ages 11 - 18 10 to 30 minutes
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In this activity, learners will create unique rockets. Each rocket will be powered by air as the learner will blow into a straw and watch their rocket fly.

1 cent - $1 per student Ages 4 - adult 10 to 30 minutes
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In this activity, learners assemble large cubes to make nano-related images. Learners discover how different objects are related to nanoscience and nanotechnology.

$10 - $20 per group Ages 4 - adult 10 to 30 minutes
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In this activity, use standard playing cards to introduce learners to cellular interactions such as cell to cell recognition and signal and receptor specificity.

$1 - $5 per group Ages 11 - 18 10 to 30 minutes
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In this activity, learners will engineer a water irrigation system. Learners will create a ditch irrigation system -- or an acequia-- to move water with the help of gravity.

$1 - $5 per student Ages 6 - adult 10 to 30 minutes
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This activity introduces learners to the structure and properties of carbon nanotubes.

$10 - $20 per group Ages 6 - adult 10 to 30 minutes
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In this activity, learners trap a thin layer of air between two pieces of Plexiglas to produce rainbow-colored interference patterns.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners will create a home for animal friends in their backyard using recycled materials. Some material suggestions include: pine straw and twigs.

1 cent - $1 per student Ages 4 - adult 10 to 30 minutes
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In this activity, learners investigate how some butterfly wings get their color.

Over $20 per group Ages 4 - adult 10 to 30 minutes
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In this activity, learners make their own Sun tracker to explore how ancient civilizations around the world studied the Sun.

$1 - $5 per student Ages 6 - adult 10 to 30 minutes