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Wind Works!
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Learners will build and experiment with their own windmills made from simple household materials.

Masses & Springs
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In this online activity, learners use a realistic mass and spring laboratory. They hang masses from springs and adjust the spring stiffness and damping.

Updrafts in Action
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In this weather activity/demonstration, learners watch as a ping pong ball is suspended in a stream of air supplied by a hair dryer.

A Simple Escapement Mechanism
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In this activity, learners build a simple mechanism that regulates the "escape" of energy released by a falling weight by portioning it into discrete amounts.

Soapy Boat
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Learners discover that soap can be used to power a boat. Learners make a simple, flat boat model, put it in water, and then add a drop of detergent at the back of the boat.

The Squeeze is On
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Each group of learners uses everyday materials, such as paper, toothpicks, and tape to design and construct a structure intended to support the weight of a cinder block for 30 seconds.

The Ballistic Pendulum
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In this physics crime lab or demonstration, learners pretend they are criminologists and must find the "muzzle velocity" (speed of the bullet as it leaves the gun) of a gun used to commit a crime.

A Matter of Splatter
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In this math-based activity, learners will experiment to find how height and angle affect spatter and then use this knowledge to solve a crime.

Spinning Illusions
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In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

Shapes and Angles
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In this activity (page 7 of PDF), learners will identify the general two-dimensional geometric shape of the uppermost cross section of an impact crater.

Gymnast
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In this physics activity, learners build a toy with a figure that spins around like a gymnast on the high bar.

Thrown For A Curve: Pitch Like A Big Leaguer
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You may have tried to throw a curveball or a slider, or even a screwball, with an ordinary baseball and found it difficult to do.

Origami Flying Disk
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In this three-part activity, learners use paper to explore Bernoulli's Principle — fast-moving air has lower pressure than non-moving air.

Buoyant Bubbles
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What keeps bubbles and other things, like airplanes, floating or flying in the air?

Scribbling Machines
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In this activity, learners explore electronics and motion by making a Scribbling Machine, a motorized contraption that moves in unusual ways and leaves a mark to trace its path.

Bike Wheel Zoetrope
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In this activity (posted on April 18, 2011), learners follow the steps to construct a zoetrope, a device that produces an illusion of action from a rapid succession of static pictures, using a 16" bik

It's the "Rain," Man
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In this weather forecasting activity, learners use common materials to construct a rain gauge and measure daily, monthly, and yearly rainfall.

Where Does the Wind Blow?
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In this activity, learners investigate wind by comparing the force of wind in different locations. Learners build wind-o-meters out of wooden sticks and strips of paper.

Potato Straw
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In this physics demonstration, learners are challenged to insert a straw the furthest into a potato.

Zip Line Zoo
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In this activity, learners build a stuffed-animal zip line. Learners hold a cord against a wall, hook a cute stuffed animal onto it, let the animal slide down, and records its travel time.