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The Carbon Cycle and its Role in Climate Change: Activity 2
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In this activity (on page 7), learners explore the meaning of a "carbon sink." Using simple props, learners and/or an educator demonstrate how plants act as carbon sinks and how greenhouse gases cause

Sound Representation: Modems Unplugged
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In this activity, learners listen to songs and decode hidden messages based on the same principle as a modem. As a final challenge, learners decode the binary messages in a music video.

A Pressing Engagement
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In this quick and easy activity and/or demonstration, learners illustrate the effect of the weight of air over our heads.

The Daily Ups and Downs
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In this activity, learners graph 48 hourly air temperatures from a local weather observation site and observe the diurnal temperature variations.

Observing the Moon
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Use this Moon Map Guide to help learners identify features on the Moon, while looking through a telescope.

Half Full or Half Empty
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In this activity (12th activity on the page), learners conduct an experiment to demonstrate how muscles are constantly feeding information to the brain about what they are doing.

Balancing Act
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In this activity, learners will explore their center of gravity.

Gravity Launch
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In this online game, learners attempt to send a rocket ship to various targets. Learners can adjust the angle and thrust of the rocket before it is launched.

The Great Balloon Race
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In this online Flash game, learners take to the skies in a hot air balloon and are challenged to beat other balloonists' times to the finish line without crashing.

Static Friction Prediction
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In this activity (page 2 of PDF under GPS: Kinetic Sculpture Challenge Activity), learners will predict which objects have to overcome the most static friction to slide down a ramp.
Tsunami: Waves of Destruction
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In this activity, learners use tsunami time travel maps to predict how long it will take a tsunami to reach the shore.

Do a Spacewalk!
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In this activity, learners train to increase muscular strength and improve upper and lower body coordination by performing the “bear crawl” and the "crab walk.” Learners perform the exercises over tim

Stereo Sound
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We listen to stereo music systems, tv's, and radios because it simulates being where the sound originates.

Globe at Night
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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

Go with the Flow
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In this quick and easy activity and/or demonstration, learners use two empty soda cans to illustrate Bernoulli's principle.
Fish Eyes: More than Meets the Eye
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In this data collection and analysis activity, learners evaluate fish physiology and ecology using vision research data from Dr.

Radioactive-Decay Model: Substitute coins for radiation
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Get a roll of pennies, throw them on the ground, then remove those that only show tails, and repeat with the ones left over.

Fill it to Capacity
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In this math lesson, learners rotate through six estimating and measuring centers. First, learners read the book, "Room for Ripley" by Stuart J.

Nutritional Challenges
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In this nutrition activity (page 26 of PDF), learners consider the nutritional needs of people with specific dietary requirements, such as athletes, persons with diabetes and vegetarians, and create a

Shrinkers: Cook up some plastic!
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In this activity (on page 2 of the PDF), learners (with adult help and supervision) investigate how heat affects polystyrene plastic.