Sound must travel through a ______ or medium to move from one place to another.

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Multiple Choice

Sound must travel through a ______ or medium to move from one place to another.

Explanation:
Sound is a mechanical wave, so it moves by making particles in a material vibrate and pass along that vibration. To travel from one place to another, there must be something made of matter for the energy to move through. That’s why a medium is needed. In a vacuum or in space, there aren’t enough particles to carry those vibrations, so sound can’t travel there. “Empty” describes a lack of matter, which also can’t carry sound. Any material—air, water, wood, metal—has particles that can vibrate and transfer the sound energy, so it’s the best choice.

Sound is a mechanical wave, so it moves by making particles in a material vibrate and pass along that vibration. To travel from one place to another, there must be something made of matter for the energy to move through. That’s why a medium is needed. In a vacuum or in space, there aren’t enough particles to carry those vibrations, so sound can’t travel there. “Empty” describes a lack of matter, which also can’t carry sound. Any material—air, water, wood, metal—has particles that can vibrate and transfer the sound energy, so it’s the best choice.

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