Tag Archives: Scale

How does a barometer work?

A barometer tells us what the weather may be like by measuring changes in air pressure.   A barometer is an instrument that measure the pressure of air. The ocean of air above us pushes down on the earth with a great deal of force.   Just as a scale measures the pressure of your weight, so …

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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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