This activity invites K–5 students, in both English and Spanish, to explore the phenomena of rolling objects down a ramp and investigate the question, “What happens to a roller when you change the ...

A few weeks ago Ryoko shared a post documenting the Shadow Remix activity that she recently facilitated. This post will provide more information about the light sources we use for our light and shadow ...

Listen to a beam of light. Audio signals can be carried by radio waves or as electrical pulses in wires. Other forms of electromagnetic radiation, such as visible light, can also carry audio signals.

Make a simple mini-motor. Give the coil a spin to start it turning. If it doesn’t keep spinning on its own, check to make sure that the coil assembly is well balanced when spinning, that the enamel ...

Dark-colored materials both absorb and emit energy more readily than light-colored materials. Using a card or strip made of temperature-sensitive liquid crystal material, you can monitor temperature ...

When we think about objects that respond to magnets, fruit usually doesn't come to mind. Watch a rare-earth magnet repel a grape and discover different kinds of magnetism. A note on magnets: Only ...

The pneumatic tire and the chain drive, followed by the development of gears, revolutionized bicycling in the later 1800s. In the last fifteen years, there has been a revolution of sorts in the ...

If you try shooting a basket or throwing a ball at a target, you'll probably come pretty close, even on your first try. But when you put on this special set of goggles and try to make the same shots, ...

The distribution of the mass of an object determines the position of its center of gravity, its angular momentum, and your ability to balance it. Place a lump of clay about the size of your fist ...

When you move your hands together, you make a half a wave on the Slinky. The middle of the Slinky is an antinode, a point of maximum motion, while the hand-held ends are nearly (but not quite) nodes, ...

You’ve probably seen an ice skater spinning on the tip of one skate suddenly start to spin dramatically faster. A diver or gymnast may also suddenly flip or twist much faster. This speeded-up rotation ...

Polarized light passing through sugar water reveals beautiful colors. White light is made up of all the colors in the rainbow. When polarized white light passes through a sugar solution, each color’s ...