of Heat, Light,
Sound is caused by vibrations.
Sound moves out in all directions.
Amazing Sound Experiment
To have sound, you must have a medium.
If there is no medium, there is no sound.
Real World Science – Sound
The Singing Glass
MythBusters – Rueben’s Tube
A property of sound is pitch.
Pitch is how high or low a sound is.
The larger or thicker the object,
the lower the pitch.
The smaller or thinner the
object, the higher the
How much energy is used determines the
volume (how loud) of the sound.
This is also called the intensity of the
A lot of energy – a loud sound.
A small amount of energy – a soft sound.