Vibrating materials make a sound. What can we change about a sound by making it vibrate differently?

How does sound travel to our ears?

The rainbow-colored lines in the back are vibrations represented as _________________. They travel to our ears after a vibrating material makes a sound.

How is this picture similar to vibrations making a sound?

Put a plastic ruler at the edge of the table so half of it hangs over the edge. Observe the ruler. Hold the ruler down with the palm of one hand on the table. With your other hand push the end of the ruler down and let it go. Observe the ruler again.

How does this investigation demonstrate vibrating materials making a sound?

Vibrations of materials make sounds. The vibration of an object creates sound waves that travel to our ears.

What are vibrations?

Which would be an example of something vibrating to make a sound?

How does this drum make a sound?

What causes all sounds?

Which investigation would work best to see how vibrating materials make sounds?