A bolt of lightning can strike the Earth with a force as great as 100 million volts.
A cold front travels at a speed of about 30 miles per hour — faster than the fastest person can run — and may overtake any warm front ahead of it. The resulting mix of air is called an occluded front.
A cumulonimbus cloud can be enormous: six miles across and eleven miles high, and twice as high as Mount Everest.
A dripping hot water faucet wastes an average of 40 kilowatt-hours of electricity per month. This is the equivalent of running a color television 8 hours a day for about 31 days.
A drop of water may travel thousands of miles between the time it evaporates into the atmosphere and the time it falls to the Earth again as rain, sleet, or snow.
A full seven percent of the entire Irish barley crop goes to the production of Guinness Beer.
A green flash is sometimes seen just as the sun sets or rises. This occurs because green light is bent most strongly by the atmosphere. So the green is seen before other colors at sunrise, and after the other colors have vanished at sunset.
The philodendron is one of any various climbing tropical American plants often cultivated as house plants. Tthe word comes from the Greek word philodendros which means "loving trees."
The poinsettia flower is named after a 19th-century ambassador to Mexico, Joel R. Poinsett, who first brought the poinsettia plant to America.
The poinsettia flower is named after a 19th-century ambassador to Mexico, Joel R. Poinsett, who first brought the poinsettia plant to America.
The practice of naming hurricanes began early this century when an Australian weather forecaster decided to insult politicians he didn't like by naming devastating tropical storms after them.
The predominance of minerals mined in the world that fluoresce come from the United States; most of these are found in New Jersey.
The primary purpose of growing rice in flooded paddies is to drown the weeds surrounding the young seedlings — rice can, in fact, be grown in drained areas.
The process of mountain formation or upheaval is orogeny.
The rings of a tree are always farther apart on the tree's southern side. Woodsmen often read tree rings to find the compass points.
The saguaro is a protected plant under Arizona state law. So are the other varieties of native cactus and most of the desert trees. But on private property, it's perfectly legal to mow them down and grind them into mulch. The State Department of Agriculture tries to discourage the practice. Some cities impose tougher requirements. Developers say they salvage as many plants as they can. Critics, though, say the law should be stronger and developers should go farther in preserving the saguaro.
The seed of the redwood trees are so small that 123,000 of them weigh scarcely a pound.
A hurricane that hit Puerto Rico in 1928 dropped 30 inches of rain over the island; the deluge was estimated to weigh 2,800,000,000 tons.
A large cumulonimbus cloud can hold enough water for 500,000 baths. Most of the water droplets in a cloud re-evaporate and never reach the ground; only one-fifth actually falls as rain.
A lightning bolt generates temperatures five times hotter than the 6,000 degrees centigrade found at the surface of the sun.
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