The traveling of sound waves
travelingSound waves need to travel through a medium such as a liquid, solid or gas. The sound waves move through each of these mediums by vibrating the molecules in the matter. Liquids are not packed as tightly as soilds The molecules located in solids are packed very tightly. Also, gases are very loosely packed. The spacing of the molecules enables sound to travel faster through a solid than a gas. Sound travels about four times farther and faster in water than it does in air. This is why, for example, whales can communicate over huge distances in the oceans. Sound waves travel about thirteen times faster in wood than air. They also travel faster on hotter days as the molecules bump into each other more often than when it is cold.
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