|
|
|
» Browse Science and Environment Term Papers
Acid Base Extraction
Number of Words: 1499 / Number of Pages: 6
... basic substance containing either 4-chloroaniline
or ethyl 4-aminobenzoate were to be separated by extraction from an ether
solution. Once the separation took place, and crystallization was carried out,
it became possible to determine what components were in the unknown mixture, by
means of a melting point determination.
Results
Procedure Observations
Inference
Dissolve 3.05g Phenol Mixture was a golden-Neutral acid
in 30ml brown/yellow color t-butyl methyl ether in
Erlenmeyer ...
|
|
Human Origins
Number of Words: 291 / Number of Pages: 2
... and studies, there is now physical proof that human beings may have evolved from ape-like creatures. Even with this, there are still disputes in the paleoanthropological field of whether or not this is true. Still, many choose to believe their religious creation stories where a God created humans. Whether it is Johanson's idea on human evolution or Leakey's or even the Roman Catholic's creation story, all are an individual own interpretation and neither wrong nor right.
A paleanthropologist by the name of Donald Johanson is one of the many who have a very different view on the origin of humans. In 19 ...
|
|
Global Warming 3
Number of Words: 1170 / Number of Pages: 5
... almost 90 million each year, and is likely to reach 10 billion by 2025(Corson 4).
The reason we currently have an atmosphere crisis is because of human impact on the gases which make up our atmosphere. Our atmosphere, which is made up of four distinct layers blankets our planet and protects up in many way. One way it protects us if from the harmful rays the sun radiates on our planet. Each layer differs from the others in temperature, density, composition and in the way it absorbs radiation from the sun. The atmosphere itself is some 300 miles thick. The first layer is the Troposphere. It is the lowest ...
|
|
Mellville And Darwin's Writings On The Galapagos Islands
Number of Words: 977 / Number of Pages: 4
... a picture of the
Galapagos Islands using everyday terms. An important part of Mellville's style
is that the he never directly describes the islands. "Take five-and-twenty heaps
of cinders dumped here and there in an outside city lot" is how Mellville's
description of the Galapagos Islands begins. This reduces the Galapagos islands
from a large, nearly inconceivable place to objects of which most any reader
can create a mental picture. When Mellville describes the flora of the
Galapagos Islands, he compares it with drying "Syrian gourds," aching for water.
Mellville discusses the solitude of the Gal ...
|
|
Greenhouse Effects Speech
Number of Words: 534 / Number of Pages: 2
... with climates around the world.
Why are greenhouse gas concentrations increasing? Scientists generally believe that the combustion of fossil fuels and other human activities are the primary reason for the increased concentration of carbon dioxide. Energy burned to run cars and trucks, heat homes and businesses, and power factories is responsible for about 80% of society's carbon dioxide emissions, about 25% of U.S. methane emissions, and about 20% of global nitrous oxide emissions. Increased agriculture, deforestation, landfills, industrial production, and mining also contribute a significant sha ...
|
|
Lead And The Environment
Number of Words: 871 / Number of Pages: 4
... rods and pipes. It can also be molded into
containers and mixed with other metallic elements.
Lead was used in ancient times for making coinage, art objects and water
pipes. One of the first known toxic substances, lead was used by the Romans for
lining aqueducts and in glazes on containers used for food and wine storage; and
it is suspected to have resulted in widespread lead poisoning. Members of the
famous Franklin Expedition to the Northwest Passage in the mid-1840s met a
similar fate, being poisoned from lead in solder, widely used at the time to
seal tins used to store foods. Until recently, o ...
|
|
Genetics Engineering
Number of Words: 655 / Number of Pages: 3
... are now being injected with a growth hormone(BST) so that
they will produce more milk than ordinary cattle(Dewitt, 1994). Also drought
resistance grass that needs no moving.
Scientists will soon be able to collect DNA from endangered species.
This DNA could be used to clone more condors, bald eagle, mountain gorillas, and
many other animals. Totally extinct animals may be recreated as well, i.e.
Jurassic Park. Imagine having your own dodo bird or pet triceratops.
Many types of diseases will be cured. Just take out the gene that giving
you the problem. Pure panacea. As soon as a baby is born his o ...
|
|
Light
Number of Words: 815 / Number of Pages: 3
... is slowed down by brief interactions, and so appears to travel more slowly.
¨ This "slowing down" is accounted for by the index of refraction of the matter.
's properties can at first seem confusing and inconsistent because of
the unique nature of light: light has the properties of both a wave and a
particle. In some situations, light's behavior is more easily explained by
thinking of light as a particle. In other situations, its behavior can only be
explained if light is thought of as a wave. This duality of light between a
particle and a wave is very difficult if not impossible to visualize ...
|
|
Klinefelter Syndrome -
Number of Words: 930 / Number of Pages: 4
... the distinctive make-up of these boys. All men have one X chromosome and one Y chromosome, but sometimes a variation will result in a male with an extra X. This is Klinefelter Syndrome and is often written as 47,XXY. There are other, less common variations such as 48,XXYY; 48,XXXY; 49,XXXXY; and XY/XXY mosaic. All of these are considered Klinefelter Syndrome variants.
The major effect of the extra X chromosome in boys with Klinefelter Syndrome seems to be the function of the testes. The testes produce the major male sex hormone testosterone and the amount of this hormone may be decreased in boys ...
|
|
The Depletion Of Ozone Layer
Number of Words: 2615 / Number of Pages: 10
... it absorbs most of the damaging ultra-violet radiation from the sun before it reaches ground level, where it can cause sun burn, skin cancer and cataracts. Research suggests that any additional UV-B (ultra-violet radiation) at ground level could depress our bodies’ immune systems, damage the natural food chain and reduce crop yields. Although ozone makes up less that 1ppm of all the gases in our planet’s atmosphere, but it is essential to life on earth. Scientists assume that in the early days of the earth’s evolution there was no atmosphere, but gases from planet surfaces and volcanoes slowly c ...
|
|
|
