Tag Archives: Waves

What is a tidal wave?

A tidal wave is a large ocean wave, usually caused by an earthquake or violent storm at sea.  Sometimes great, destructive waves sweep in from the sea like a huge tide.  Most people call these “tidal wave,” but they have nothing to do with true waves. Scientist have a special name for tidal waves.  They …

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What makes an ECHO?

If you shout or clap your hands in a canyon, the sound may make an echo.  An echo is a sound that we hear after it is reflected, or bounced back, from some large obstacle. When you call out in a canyon, the sound waves of your voice travel through the air in all directions.  …

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What causes waves?

Water waves are caused mainly by the wind.  On a windy or stormy day there are many waves in the water, and on a calm day there are fewer waves. This explains what makes most waves in the water.  Winds push up waves on seas, lakes and ponds.  The waves you see on a calm …

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What is a Quasar?

The mysterious quasars (KWAY sahrs) are intensely bright, star like objects on the edge of the universe.  One of the big mysteries about the quasars is what they are.  Not stars and not galaxies (groups of stars), quasars have baffled scientists since they were discovered in the early 1960s. A quasar is many times brighter …

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