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» Browse Science and Environment Term Papers
Condor
Number of Words: 1212 / Number of Pages: 5
... -- after eating, they clean their heads and necks by rubbing them on grass, rocks, or tree branches. s also bathe frequently and spend hours preening and drying their feathers.
s were probably never very numerous in North America. The species once ranged along the entire Pacific Coast from British Columbia to Baja California. Fossils have been found as far east as Texas, Florida, and New York. More recently, however, they were confined to a horseshoe-shaped area north of Los Angeles.
For years, no one knew precisely how many California s existed, although they have been considered to be a declining ...
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Electronic Commerce
Number of Words: 691 / Number of Pages: 3
... companies to have much larger markets, once you are on the Internet you are everywhere. A customer in Japan can buy exactly what a customer in the UK buys from the same electronic store. The capability to purchase products at ease from all over the world would eventually result in the weakening of international boundaries and increased trade between countries. For example when the machinery for one of General Electric's light-bulb factories broke down, GE would invite bids from four domestic suppliers. With the help of the Internet General Electric extended its bidding abroad, and awarded the contract ...
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Acid Rain 8
Number of Words: 417 / Number of Pages: 2
... also particularly affected the northeastern United States and eastern Canada.
Industrial emissions have been blamed as the major cause of acid rain. Because the chemical reactions involved in the production of acid rain in the atmosphere are complex and as yet little understood, industries have tended to challenge such assessments and to stress the need for further studies; and because of the cost of pollution reduction, governments have tended to support this attitude. Studies released by the U.S. government in the early 1980s, however, strongly implicated industries as the main source of acid rain ...
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Ozone
Number of Words: 1858 / Number of Pages: 7
... most
ultraviolet light. Ozone prevents most UV-B radiation from reaching the surface
of the earth (Environment Canada, 1996). Ozone is very important to life on
earth because the harmfulness of high-energy UV-B radiation stems from the high
energy of these light rays, enabling them to penetrate deeply into water, plant
tissue and epidermal tissue of animals. Increased UV-B radiation results in
harming the metabolic system of cells and ultimately damage to genetic material
present in effected cells. Living organisms on the surface of the earth have
always been exposed to some, and only slightly diffe ...
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Cfc
Number of Words: 1018 / Number of Pages: 4
... ozone layer. When these s do brake down, they released atomic chlorine which then would react with the ozone and convert it back into plain oxygen. The even worse part of all this is that these chlorine molecules do not become inactive after the first reaction with the ozone and would be available to destroy more ozone molecules. Thus this process would be the function of a catalyst; a single chlorine atom involved in a chain reaction to destroy many ozone molecules.
Rowland and Molina eventually agreed that this thinning of the ozone shield can cause a catastrophe for Earth's living beings, includin ...
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Plate Tectonics
Number of Words: 819 / Number of Pages: 3
... mapping of the seafloor also revealed that these huge underwater mountain ranges have a deep trench which bisects the length of the ridges and in places is more than 2000 meters deep. Research into the heat flow from the ocean floor during the early 1960s revealed that the greatest heat flow was centered at the crests of these mid-oceanic ridges. Seismic studies show that the mid-oceanic ridges experience an elevated number of earthquakes. All these observations indicate intense geological activity at the mid-oceanic ridges.
Geomagnetic Anomalies
Peridically, the Earth's magnetic field reverses. N ...
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Copernicus
Number of Words: 205 / Number of Pages: 1
... planetary motion. The three most popular instruments which
used were quadrant, armilla, and triquetrum. All furnish some measure of the
position of the heavenly body. It took an endless amount of mathematical
calculations to come up with the Copernicus' theory. He had to find out how
fast the Earth spins around the Sun, and how far the Sun is. He also had to
calculate the length of the orbit of the Earth. People use math in every walk
of life. In our days everything is related to math, and Copernicus used his
knowledge of mathematics to provide the human kind with an important discovery.
O ...
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The Downy Woodpecker
Number of Words: 3725 / Number of Pages: 14
... scientific names all from
different regions of the United States and southern Canada which I have listed
below:
southern downy / Dryobates pubescens Gairdner's woodpecker / Gairdneri pubescens
Batchelder's woodpecker / Leucurus pubescens northern downy / Medianus pubescens
Nelson's downy / Nelsoni pubescens willow woodpecker / Turati pubescens
The downy woodpecker is sometimes reffered to as "little downy."
Behavior Towards Humans
The downy is unquestionably the friendliest woodpecker. A bird lover
in Wisconsin described downies at their feeding station: "The downies will ba ...
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Plant Evolution
Number of Words: 832 / Number of Pages: 4
... which eventually developed into tree trunks. They became tree-like and up to 40 meters tall, forming the world's first forest.
'The Age of Seed Bearing Plants' was the next stage of plant history where plants were taken to their next step up in the evolution. This occurred around 280 million years ago. This was also the dinosaur era. Earth began to become a lot drier, and these plants began to adapt to the ever so changing climate. These plants developed the ability to produce seeds to reproduce their new generations. The advantages of this was that these seeds were able to survive dry periods, even l ...
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The Beginning Of Time
Number of Words: 1333 / Number of Pages: 5
... galaxy in the universe was moving
away from each other, this meant that the universe was expanding. Hubble found
the movement of the galaxies by using a phenomenon known as the Doppler effect.
This effect caused bodies moving away from an observer to have a "red-shifted"
spectrum (the light spectrum of the body had been shifted closer to red) and
bodies moving towards an observer to be "blue-shifted" (Hawking, 1988)
The expansion was traced backwards through time to discover that all the
galaxies had originated from the same point. It was later believed that all
matter spawn from that "center of the ...
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