1
Collision and coalescence is the process by which cloud droplets grow large enough to fall as rain in clouds. You will suspend two ping pong balls in the stream of air supplied by a hair dryer. The balls will bump into each other, creating a clicking sound signifying the collision.
Grade Level   6 7 8 9 10 11 12
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2
We feel the wind everyday. The air is almost always in motion. One day it may be from the north and the next day from the south. There are many sources for wind: mechanical sources such as fans and, in nature, falling rain as it drags air along. But what is the origin of wind on the earth? Using a...
Grade Level   9 10 11 12
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3
The constant pushing of molecules into each other if the reason we feel wind. As one molecule bumps into another, it transfers energy into the next molecule. This constant pushing on the oceans surface also transfers energy to the water. This energy transfer is responsible for the motion of the...
Grade Level   7 8 9 10 11 12
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4
Barometers using mercury are heavy and fragile. The first working version of an aneroid (without water) barometer was built in 1843 by French scientist Lucien Vidie. This made the barometer very portable and it became a commonly used meteorological instrument. It was still calibrated to the...
Grade Level   9 10 11 12
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5
The amount of air over us is constantly changing. As a result, the weight of that air, called pressure, is constantly changing. These changes in air pressure are indications of changes in our weather. We measure this change using a device called a barometer (bar-meter or measurer).
Grade Level   9 10 11 12
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6
Learn Science and Safety with the National Weather Service's Owlie Skywarn. NWS Education brings adventures and information to kids, teens, parents, and teachers. Owlie Skywarn puts you on the road to becoming a Young Meteorologist, all while sharing NWS Publications and Brochures on weather safety.
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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7
"Join Owlie and friends to embark on a """"Severe Weather Preparedness Adventure!""""Most appropriate for elementary and middle levels, this online game -- produced as part of NOAA and the National Weather Service's Young Meteorologist program -- teaches students how to stay safe through weather...
Grade Level   K 1 2 3 4 5 6 7 8
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8
"Welcome to JetStream, the National Weather Service Online Weather School. This site is designed to help educators, emergency managers, or anyone interested in learning about weather and weather safety. The information contained in JetStream is arranged by subject, beginning with global and large...
Grade Level   6 7 8 9 10 11 12
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