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Sound travels about four times faster in water than in air.

Sound travels about four times faster in water than in air.

Underwater, sounds zoom along much more quickly. That is one way whales can hear each other far away.

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When you clap, your hands hit together to make a sound. When you clap, your hands hit together to make a sound. Sounds are made when things shake, or vibrate. Sounds are made when things shake, or vibrate. You hear sounds with your ears. You hear sounds with your ears. A drum makes sound when you tap its tight skin. A drum makes sound when you tap its tight skin. Whispering is talking very, very quietly. Whispering is talking very, very quietly.