Tag Archives: Air

Where does dust come from?

Housekeepers spend a good deal of time dusting.   If you have ever helped clean, or dust, furniture, you may have wondered where all the dust comes from.  It seems to be a daily chore, because dust is always with us. Dust settles from the air and makes a gray coating over everything around us.  Dust …

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How is nylon made?

Nylon is a product of a chemical process in which carbon, nitrogen, oxygen and hydrogen are united to form a strong, tough material. Nylon is a strong, long-lasting synthetic material.  Its uses range from such things as shear hosiery and fishing lines to toothbrush bristles and molded parts for machinery. Nylon is made from common …

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What makes the wind blow?

Wind is caused chiefly by the uneven heating of the earth by the sun. All winds, from gentle breezes that rustle leaves to raging hurricanes, are caused chiefly by the uneven heating of the earth by the sun. When the air near the ground gets hot, it expands or swells.  This makes it lighter, and …

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What makes the color in a rainbow?

The colors in a rainbow are made by sunlight shining through raindrops in the air, which separate the light into the colors of the spectrum. A rainbow occurs at the end of a storm, when the sun begins to shine while the air is still filled with raindrops. When the sunlight passes through the millions …

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What causes rain?

You know rain falls from clouds.  Have you ever wondered how raindrops happen to be in clouds? Moisture is constantly evaporated from the earth’s surface by the warmth of the sun.  the invisible water vapor is carried upward by currents of warm, rising air.  As the moisture-loaded air rises it cools. As the air cools, …

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How does a blimp stay in the air?

A blimp is an airtight bag that is able to rise in the air because it is filled with light gases.  A blimp is a small, balloon-like airship.  Unlike the heavier-than-air airplane, the blimp remains aloft because it is lighter than air.  It needs only small motors to push it forward.  Blimps are descendants of …

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What is a heat lightning?

Heat lighting is the flashes of light produced by distant electrical storms.  The flashes of lightning occur too far away for thunder to be heard. Sometimes, on warm summer evenings, we see so-called “heat lightning”—silent flashes of light in the distant sky.  Heat lightning is really light from a flash of chain lightning that takes …

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