An avalanche is a layer of snow that flows down a mountain slope. Only three things are required for an avalanche: a slope between 25 and 65 degrees, a layer of snow with a weak layer beneath and a trigger….
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Since at least the early 1990s, a recurring topic in the media has been the ozone “layer.” There have been many facts, myths and suppositions stated about ozone. Unfortunately, many of the myths and suppositions have taken more of a…
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Movement of water, by means of erosion and geology along with climate, is responsible for creating river landforms. Their shapes reveal their ages. Young rivers have valleys in V-shapes and irregular depths. Mature rivers have long sloped valleys and meandering…
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It is more than a little bit tricky to set forth a definitive list of facts about ball lightning, because there are relatively few hard facts that anyone agrees on. The very existence of ball lightning is not universally accepted…
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Mineral grains make up the building blocks of every kind of rock, whether it’s a crumbling sandstone pebble or the smooth, polished granite of expensive countertops. Earth scientists use the minerals present to identify rock types, which is one part…
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The Great Blizzard of 1993 was a large cyclonic storm that occurred from March 11 to March 15 on the East Coast of North America. It was distinguished from other storms due to its intensity, size, and wide reaching effect….
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When you go outside on a windy winter day, the cold air seems to take your breath away and it feels even colder than the thermometer would lead you to expect. This is the physical manifestation of the phenomenon known…
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A barometer is a meteorological instrument that measures atmospheric pressure. Meteorologists (scientists who study the weather) use barometers to predict changes in the weather using the fact that a change in air pressure is a change in weather. A rising…
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The Earth’s seasons are the result of the Earth’s rotation around the Sun and the tilt of its axis relative to the ecliptic. The seasons mark the time of year when the Earth experiences weather and ecological changes. The seasons…
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Over the course of the over four and a half billion years since the earth began forming, it has gone through many changes. One of the most important developments was the atmosphere that supports life on this planet. There are…
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