Can a Wave Carry Energy Without Carrying Stuff Along?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Can a wave carry energy without carrying stuff along?

The Big Idea

A wave carries energy from one place to another. But the stuff it moves through barely travels at all. Let's see how that works!

Flick a Rope

Step one: flick a rope. When a wave moves across a rope, the rope itself stays in about the same place. Only the up-and-down motion travels along it.

Water and Sound

Step two: water, sound, and light. The same is true of waves on water, sound waves, and light waves. They carry energy while the material only moves back and forth a little.

The Stadium Wave

Step three: the stadium wave. A stadium wave moves around the arena, but every person stays in their seat. The wave is the energy moving, not the people.

A Closer Look

Let's take a closer look! The rope bumps up and down. A water wave lifts a floating duck. Sound shakes the air back and forth. Fans stand up and sit down in turn.

Quick Facts

Quick facts! A duck on a lake bobs up and down while the waves roll past. Sound waves shake the air back and forth to carry energy. In a stadium wave, every person stays in their seat. Waves carry energy from one place to another without carrying the material along.

Think Like a Scientist

Now, think like a scientist! Tie a rope to a chair. Flick the free end up and down. Watch the wave move along the rope. Notice that the rope stays in place! Tell a grown-up what you discover!

Outro

A wave can carry energy from one place to another without carrying stuff along. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!