What Is Sound?

Design Squad

See how servo devices are used to adjust the motion or position of an object.

What Is a Servo?

See how radio control in a remote control system works.

What Is Remote Control?

What Is a Shrink Wrap?

What is green alternative energy? Deysi goes on a scavenger hunt to find examples.

Green Energy Hunt

What is isometric sketching? Watch as Deysi explains how you can sketch in this way.

What is Isometric Sketching?

How can you make regular objects into things a computer recognize?

What is MaKey MaKey?

See how a fastener called a pop rivet holds two pieces of material together.

What Is a Pop Rivet?

See how to make a solid joint using a mortise and tenon.

What Is a Mortise and a Tenon?

See how adding this spring to a hinge makes it easier to open or close.

What Is a Torsion Spring Hinge?

See how buoyancy works to support a boat.

What Are Torque and Force?

Watch as Nate explains what an i-beam is!

What is an I-beam?

See the main parts of a suspension bridge and how they work together.

What Is Suspension?

See how welding uses intense heat to melt pieces of metal together.

What Is Tig Welding?

See how increasing the number of air molecules in a confined space increases the pressure.

What Is Compressed Air?

See how compressed air can be used to move a piston rod back and forth.

What Are Pneumatic Pistons?

A lever is a simple machine. See how it works.

What Are Levers?

What Is Sewing?

See how center of mass is the point where a suspended object stays steady and doesn't tip.

What Is a Center of Mass?

See how a truss structure uses triangles to distribute the load.

What Is a Truss?

See how a boat's shape effects its stability.

What Is Stability?

See how a drag plate on a dogsled uses friction to slow or stop the sled.

What Is Friction?

See how to get video images from a camera to a screen, without wires.

What Is Wireless?

See how an electric current flowing in a coil produces a magnetic field.

What Is a Solenoid Valve?

See how this steerable balloon uses buoyancy to stay afloat.

What Is a Dirigible?

See how the parts of a kayak go together to make a strong boat.

What Is a Kayak?

What Is Buoyancy?

Find out the difference between cement and concrete.

What Is Concrete?

A fuse is a thin piece of metal. See how it protects a circuit.

What Are Fuses?

See three ways to check whether a rectangle truly has square corners.

What Is Level?

See how the different parts of a sailboat work together to move and steer the boat.

What Are the Parts of a Sailboat?

See how biking uphill is one way to build potential energy.

What Is Potential Energy?

See how a boat floats because of how it moves, or displaces, water.

What Is Water Displacement?

A sound can be low or high. That’s called pitch. Find out how pitch works.

What Is Pitch?

National Science Foundation

What Is...

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