The importance of Earth's magnetic field
By: Jose Juan Gutierrez
The Earth´s magnetic field, also known as the geomagnetic field, is an immense invisible shield of magnetic field lines encircling the Earth. The magnetic field protects the Earth from highly charged particles leaving the Sun. The Earth´s magnetic field surrounds planet Earth, extending...
By: D. Vogt
In May 2013, scientists at Cornell and Cincinnati universities announced that 380-million-year-old clam fossils show evidence of how the natural ecosystem can stay surprisingly stable even during periods of severe environmental change. The research was published in the journal PLOS One. The geological period in...
By: Desmond Birch
Isobars are lines of equal pressure on a meteorological map used to predict weather patterns, but to understand isobars you first need to define atmospheric pressure. Atmospheric pressure is the weight of air molecules overhead Low pressure is usually formed when the air is heated...
By: Gabriele Porrometo
The Atacama Desert is one of the driest places in the world, second only to The Dry Valleys of Antarctica. It is located in the northern part of Chile and occupies small territories in Argentina, Peru and Bolivia. It is around 621 miles in length...
What kinds of invasive species of plants are in the US Midwest?
By: Christyl Rivers
Invasive species are those which are so opportunistic that they quickly displace native plants. Often they trigger cascade effects by eliminating a key food source for herbivores and in turn the native predators that depend upon them. They can carry plant diseases, pathogens and destructive...
Understanding atmospheric pressure
By: Jose Juan Gutierrez
Atmospheric pressure refers to a mass of air in the atmosphere, exerting weight over a unit of area. The pressure of air at any level in the atmosphere is measured by the total mass of air above any point. The density of air is greatest...
What is the greenhouse effect?
By: Jose Juan Gutierrez
The greenhouse effect is the natural process by which the Earth´s atmosphere captures some of the Sun´s radiation wavelengths, warming the Earth´s surface sufficiently enough to support life; however, human activities, including the burning of fossil fuels and deforestation have contributed to...
By: Christyl Rivers
Methane is a concern for climatologists as it is a detrimental greenhouse gas. Yet, methane is natural. Only the concentration of it in recent post-industrialization is problematic. Methane in the atmosphere has effectively doubled in the last two hundred years. The fact is that methane...
By: Michael Totten
Unlike temperate forests, where forest fire is essential to continued forest health and even species reproduction, fire is not a natural part of a rain forest cycle. Nearly every rain forest fire which has been observed from satellites is adjacent to human habitation, and the...
By: Karen Parker - 704366
Isobars are lines that depict areas of equal and constant pressure at the Earth’s surface or at a constant height above it on a meteorological map. Each line passes through a pressure of a given value, but they can never cross or touch. Isobar...

 

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