A pulley is simply a single wheel, suspended from its axle, with a guide track for a rope or cable at the wheel's rim. The pulley described below can be used to lift light loads up to 20 lbs.
Make a lava-spewing volcano as a science project or just for fun. If you have children, let them help you because this is something the whole family can make together. So gather up are the...
If your idea of a science kit is a little, white, metal case containing litmus paper to dip into beakers and test tubes for mixing vinegar and baking soda (over and over), think again. Science...
A good guide will show you how, when, where and what to look for in weather conditions.
Countless concerned citizens devote time and energy volunteering as tornado spotters during severe weather. Though anyone might see a tornado, tracking requires a person with training, skill and...
Tornadoes can occur anywhere in the world, but these powerful, fearsome storms are most common on America's Great Plains during the spring and summer.
"Everyone talks about the weather, but nobody does anything about it," said Mark Twain. The best we can do is observe. The clouds, especially, provide an ever-changing pattern of swirling sights...
"You don't have to be a weatherman to know which way the wind blows," sang Bob Dylan. True enough, as far as it goes. Learning to watch the skies - how the clouds form and dissipate - can tell us...
Clouds are simply water vapor condensed to the point of being visible, but their formation and movement reveal much about the natural world that surrounds us.
Weather is dynamic. We see this most dramatically when clouds form, combine and dissipate. We can watch them, follow their evolution and learn much about our climate.
Look high into a nearly clear sky. You'll see wispy, feathery clouds tracing across the edge of the stratosphere. Those clouds are cirrus clouds - moisture thrust up by storms far away to turn to...
A barometer is a simple instrument for determining the pressure generated by the weight of the atmosphere. It can be used both for assisting in forecasting weather and for determining altitude....
Whether you are a freshman in high school biology, a post-graduate chemist in college, or just working on a problem in your everyday life, the Scientific Method can help you organize, test, and...
Bored on a rainy day? Want to know how fast rain is falling in the hopes that the clouds will soon dry up? It’s pretty difficult to say with exactness how fast the rain outside your window is...
The nuclear power industry got a one-two punch in the late 1970’s and mid-1980’s: first, the movie “The China Syndrome” convinced millions of Americans that nuclear plants were ticking time bombs,...
Long a staple of pulp fiction and incomprehensible sci-fi movies, over the past few decades the concept of time travel has attracted the attention of an increasing number of physicists. The...
All life as we know it ultimately owes its existence to a single molecule: deoxyribonucleic acid (DNA for short). Although conceptually fairly simple in itself, the DNA molecule in a living cell...
At first blush, you might think that no one could actually “understand” the concept of infinity—after all, by its very definition, infinity lies beyond what any (finite) being can possibly...
Early in the 20th century, Albert Einstein discovered that our ordinary three dimensions of space are inextricably linked with a fourth dimension, time, in what physicists refer to as “spacetime.”...
The urban legends are true. The makers of Mentos, a candy that is most identifiable for its ridiculous commercials, have another dubious feat to add to their product's already auspicious...
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