Acid Rain
.... were noticing that many of the lakes were beginning to show
signs of death. Fish were found dead along the banks of many rivers. As the
winters ice began to melt off more and more hundreds upon hundreds more
dead fish were being found. As scientists continued to work they found many
piles of dead fish, up to 5000 in one pile, further up the river. Divers
were sent in to examine the bottom of the rivers. where they found many
more dead fish. Many live and dead specimens were taken back to labs across
Norway. When the live specimens were examined they were found to have very
little sodium in their blood. This is typical .....
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Limonene And Its Uses
.... 3083, limonene.
Use Profile
Limonene is a naturally occurring chemical which is used in many
food products, soaps and perfumes for its lemon-like flavor and odor.
Limonene also is a registered active ingredient in 15 pesticide products
used as insecticides, insect repellents, and dog and cat repellents.
Pesticide products containing limonene are used for flea and tick
control on pets, as an insecticide spray, an outdoor dog and cat repellent,
a fly repellent tablecloth, a mosquito larvicide, and an insect repellent
for use on humans. Formulations include ready-to-use solutions,
emulsifiable concentrates, granular .....
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The Importance Of The Ozone Layer
.... atmosphere.
It is important to remember that ozone is constantly being created and
destroyed in the atmosphere. The amount of ozone in the atmosphere is based
on these reactions. There are many factors that influence the amount of
reactions like season, latitude, and solar cycle. Because of these factors
ozone can vary wildly each day. In the northern latitudes there can be up
to 40% difference than the day before. And in the equator regions, there
might be no variance at all.
Unfortunately, the Congress passed a bill reducing the production of CFC's
based on a NASA document. This document only told half of the truth. It
said th .....
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What Is A Plant?
.... increase the surface of the roots,
which results in more gathering of minerals and water. Stems are usually
above ground, grow upward, and usually have leaves. Plants that do not
have leaves generally use the stem as the photosynthetic surface, like
cacti. Leaves are still the most common photosynthetic surface on plants,
though. Leaves absorb carbon dioxide and release oxygen. Some leaves of
plants have spines or thorns to provide them with protection from animals.
Certain types of plants have highly modified leaves to trap and digest
insects, known as insectivorous plants.
Most plants exist have separate male and female par .....
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Atomic Theory
.... for
gas is followed, more or less. In the early 1960s, though, the
international union of chemistry and physics agreed that there would be a
new standard, carbon isotope (carbon-12).
British physicist Ernest Rutherford found and proved that an atom's
mass is concentrated in its its nucleus, which is the center of the atom.
He also gave the idea that parts of an atom, called its electrons, orbit
the nucleus. He said that the electrons were "negatively charged" and that
the protons were "positively charged". He said that the two charged always
equalled each other/cancelled each other out (making it neutral).
Danish physicist ma .....
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Life On Other Planets?
.... even notes that “Even if a planet or
moon could not support life globally, each could contain a tiny niche where
life could thrive” (Science News, 328).
What are the most favorable conditions for life to develop? It is
now known that life simply cannot emerge anywhere that does not contain
water. It is mostly preferred that this water exists in liquid form, but
there are possibilities that life can form in freezing as well as boiling
conditions. Water and energy, which both exist in many places in outer
space, are prime biological prospecting sites. this ranges from deep sea
thermal vents to the Martian tundra, yet unexplai .....
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Aluminum
.... and elements to from alloys for common uses. In Society
Aluminum Alloys are used in many ways because of it's light weight and
versatility. As more and more ways are discovered to strengthened Aluminum
with other elements more uses have also been discovered Aluminum is used in
aircrafts, Electrical Engineering, Windows, doors, buildings, packaging and
many other things. When aluminum is compounded with other it gets stronger
for multiple uses. It is usually is compounded with copper, magnesium
silicon, zinc, oxygen, and potassium. the strength of the alloy depends on
the element it is compounded with.
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Center Of Gravity
.... plane will
fall out of control.
You must limit the weight and its positioning on board the aircraft
to prevent these occurrences from happening. The engineers design an
airplane so that it has a maximum weight capacity of passengers, cargo,
fuel, and etc... The engineers design an airplane so that the center of
gravity must stay within certain limits. Any weight added to an airplane
may change the center of gravity, but if the weight you put on board is
within the plane's maximum weight capacity and within the center of gravity
limits the airplane will keep flying safely.
Another way to keep the center of gravity within the safe .....
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The Greenhouse Effect
.... of breaking down ozone
particles that shield us from the sun's ultraviolet rays. Too many
ultraviolet rays can cause cataracts and skin cancer. A hole in the ozone
has been discovered over Antarctic the size of the United States. The hole
is actually where the ozone has been depleted or thinned by the CFCs. The
use of aerosol cans accounts for most of the release of CFCs. This
resulted in the United Stated as well as other countries outlawing the use
of these harmful chemicals in aerosol cans. Experts think that CFCs can
stay in the atmosphere at least three hundred years.
In order to slow the greenhouse effect, or global w .....
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Acid Rain
.... is often quite difficult. A lake does not become
acid over night. It happens over a period of many years, some times decades.
The changes are usually to gradual for them to be noticed early.
At the beginning of the 20th century most rivers/lakes like the river
Tovdal in Norway had not yet begun to die. However by 1926 local inspectors
were noticing that many of the lakes were beginning to show signs of death.
Fish were found dead along the banks of many rivers. As the winters ice
began to melt off more and more hundreds upon hundreds more dead fish
(trout in particular) were being found. It was at this time that scientist
b .....
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The Dung Beetle, What A Marvelous Creature.
.... you must first know a few facts about them. Dung
beetles are named after their delight in rolling up dung. Dung beetles
utilize the dung of cows, horses, rabbits, deer, sheep, and many other
animals. How many of you think dung beetles actually eat manure? The
answer is yes. Dung beetles just love fresh dung. They shove the dung into
their mouths, squeeze it, and drink the juices that come streaming out! The
solid parts of the dung are squeezed for a second time in their jaws, and
then swallowed. If there are any eggs that flies might have laid inside the
dung, this squeezing action kills them. Now, before you say "Gross!" thin .....
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Black Holes
.... observers, stopping
completely on the horizon. Once a body has contracted within its
Schwarzschild radius, it would theoretically collapse to a singularity—that
is, a dimensionless object of infinite density.
Formation
Black holes may form during the course of stellar evolution. As
nuclear fuels are exhausted in the core of a star, the pressure associated
with their heat is no longer available to resist contraction of the core to
ever higher densities. Two new types of pressure arise at densities a
million and a million billion times that of water, respectively, and a
compact white dwarf or a neutron star may form .....
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