Tag Archives: Lakes

What is a dune?

A dune is a hill or mound of sand drifted by the wind. A dune is a hill of sand.  Dunes are round along sandy shores of lakes and oceans and in sandy deserts. They are built by the wind.  At the wind blows, it piles the sand into hills that often look like ocean …

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What are clouds made of?

Pluffy dark clouds and fluffy white clouds—all clouds are made of the same thing.  They are made mostly of tiny droplets of water drifting about on currents of air.  Water to make clouds comes from oceans, lakes and streams. Everywhere water is continually evaporating into the air in the form of an invisible gas called …

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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 Artesian well?

An artesian well needs no pump.  It spurts out of the ground like fountain.  There is more water in the world than in our oceans, lakes and streams.  A good deal of water can be found beneath the ground. Springs are formed when water from rain and melted snow seeps deep into the ground.  The underground water can fill …

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What is an aqueduct?

A big city needs a lot of water.  Some cities are near big lakes or rivers.  They find it easy to get enough water. But very often the lakes or reservoirs upon which a city depends for water are many miles from the city.  Then aqueduct must be built. The word “aqueduct” comes from two Latin …

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