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  • Sound comes from vibrations. These vibrations create sound waves which move through mediums such as air and water before reaching our ears.

  • Our ears vibrate in a similar way to the original source of the vibration, allowing us to hear many different sounds.

  • Dogs can hear sound at a higher frequency than humans, allowing them to hear noises that we can't.

  • Sound is used by many animals to detect danger, warning them of possible attacks before they happen.

  • Sound can't travel through a vacuum (an area empty of matter).

  • The speed of sound is around 767 miles per hour (1,230 kilometres per hour).

  • The loud noise you create by cracking a whip occurs because the tip is moving so fast it breaks the speed of sound!

  • When traveling through water, sound moves around four times faster than when it travels through air.

  • The scientific study of sound waves is known as acoustics.

  • Although music can be hard to define, it is often described as a pleasing or meaningful arrangement of sounds.

  • The sound of thunder is produced by rapidly heated air surrounding lightning which expands faster than the speed of sound.

    Source: http://www.sciencekids.co.nz/sciencefacts/sound.html

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12y ago

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