In a vacuum, sound cannot travel because there is no _____. (2020)

In a vacuum, sound cannot travel because there is no _____. (2020)

Step 1: Understand what sound is. Sound is a type of energy that travels in waves.
Step 2: Learn about mediums. A medium is a substance (like air, water, or solid objects) that allows sound to travel through it.
Step 3: Know what a vacuum is. A vacuum is a space that has no matter or particles in it.
Step 4: Realize that sound needs particles to move. Sound waves are created by vibrating particles, which bump into each other to carry the sound.
Step 5: Conclude that in a vacuum, there are no particles to carry sound waves, so sound cannot travel.

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