What is a moon bow and how is it formed?
By: Greg Kensington
A moonbow is the nighttime version of a rainbow. Where a rainbow is caused by the deflection of the sun’s direct light through water droplets, a moonbow is created by the light provided by the moons reflection as seen through these same droplets of...
Strange weather: What pyrocumulus clouds are and how they are formed
By: Noemi Csifo - 655848
Fire Cloud A pyrocumulus cloud, which is often grayish to brown in color, is formed during volcanic eruptions and large forest fires. This type of cloud is a dense cumuliform cloud, this means it has strong vertical development and clearly defined edges. Sometimes a...
The classification of sedimentary rocks
By: Keith Redfern
Sedimentary rocks are formed from material which was once a sediment. Therefore they are normally formed under a mass of water, making up a series of layers, or strata. These strata, originally horizontal, can often become folded or cracked (faulted) by earth movements. Older rocks...
By: Dr Pandula Siribaddana
From ancient times, the direction of winds gave people some idea about the incoming weather. Even in a technologically advanced era such as the 21st century, the meteorologist never underestimates the importance of wind direction in making weather predictions. However, the difference is the use...
The visible signs of a pine beetle infestation
By: Barbara Stanley
The Southern Pine Beetle, smaller than a grain of rice, destroyed over 14,000 acres of pines in New Jersey in 12 months. Signature pine forests from New Mexico to British Columbia have been wiped out by the pine beetle. Montana lost 1,000,000...
By: Jose Juan Gutierrez
A moonbow (lunar rainbow) is the sight of spectral colors created by moonlight over a medium, for instance, a waterfall. A moonbow is caused by the sunlight which is reflected off the surface of the moon. Moonbows are formed when light rays are diffracted off...
By: Dr Pandula Siribaddana
When travelling in a long stretch of desert road, one may see the presence of ‘water’ on the road at a distance. However, when one travels towards it, the appearance of ‘water’ will disappear, or it may appear again at a distance. Such...
By: Jose Juan Gutierrez
A mirage is an optical illusion that occurs when light rays are bent, producing a displaced image of distant objects. A mirage is caused by changes in atmospheric density in the lower air layers of the atmosphere which depend upon air temperature with height in...
By: Dr Pandula Siribaddana
According to scientists, the planet earth encounters cyclical cold extremes, which we have come to know as ‘ice ages’. In the 1920s, a mathematician named Milutin Milankovitch postulated a theory to describe this phenomenon based on several factors which later became known as &lsquo...
Strange weather: What pyrocumulus clouds are and how they are formed
By: Lane Olinghouse
Pyrocumulus clouds form under special conditions of extreme ground-level heat. In the sky they often resemble huge, brown or grayish brown, lumpy-surfaced puffballs. Pyrocumulus clouds originate most commonly in areas subject to frequent wildfires. These characteristic phenomena gave rise to the formation's name, pyro being...

 

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