What Is Sound?: Sound

Sound is a form of energy created by vibrating matter. It travels through different mediums such as air, liquids, and solids. In air, sound can be heard when a guitar string is plucked. In liquids, whales communicate over long distances. Sound also travels through solids, like when knocking on a door. However, in space, sound cannot travel due to the lack of a medium.

What is sound primarily considered as?

• A form of electrical energy

• A type of chemical energy

• A form of energy called sound energy

• A type of light energy

What happens when a guitar string is plucked?

• It remains still

• It vibrates and produces sound

• It produces light

• It changes color

Through which mediums can sound travel?

• Only through air

• Only through liquids

• Only through solids

• Through air, liquids, and solids

How do whales communicate over long distances?

• By sending light signals

• Through water

• By using radio waves

• Through air

Why is there no sound in space?

• Because sound waves are too weak

• Because space is too cold

• Because there is no medium for sound to travel

• Because space is too dark