Frogs
.... find frogs on every continent except Antarctica. The family of frogs called Ranidae, include the leopard frog and the bullfrog. These frogs are found in North America, South America, Asia, Australia and Europe. The green-boned frogs and the arrow poison frogs are found only in Central and South America.
On all these continents and in all these countries, frogs can be found all over the place. Some frogs live in the dessert, some live in the woods, some live in the water and some live in trees. Some frogs live in the swamp and some live in the mountains.
III. Feeding habits of the frog
Like all animals, frogs have .....
|
|
Iron Meteorites
.... meterites do play an important part in science to day, and help scientist decode the birth of earth, our sun, and even the galaxy in which we are in.
Today whenever a meteorite is found it is closely strdied by teams of scientist, to see if it could decode some of the many questions we have about our galaxy, and even the many galaxies found around ours. A single meteorite that has traveled millions upon millions of light years could possibly unravell many of the questions that puzzle physical scientists to this very day.
.....
|
|
Landfills
.... (Landfills 1).
There are many things deposited in landfills. Garbage, rubbish, ashes, large wastes, dead animals, sewage-treatment solids, industrial wastes, mining wastes and agricultural wastes are all materials deposited in landfills (SWD 1). Many of these materials, about 50%, could be recycled, like glass, plastic, paper, etc., instead of being put in landfills. Some trash put in landfills is biodegradable, and some will never decompose. Food, yard wastes and paper were found in landfills from around 50 years ago, and they never did decompose. A newspaper was found dating back to earlier than 1960 that was supposed to .....
|
|
A Brief History Of Clocks: From Thales To Ptolemy
.... the anaphoric clock and the astrolabe, I believe that the development of the anaphoric clock preceded the development of the astrolabe.
The earliest example, in western culture, of a celestial sphere is attributed to the presocratic philosopher Thales. Unfortunately, little is known about Thales’ sphere beyond Cicero’s description in the De re publica:
For Gallus told us that the other kind of celestial globe,
which was solid and contained no hollow space, was a very
early invention, the first one of that kind having been
constructed by Thales of Mileus, and later marked by
Eudoxus with the .....
|
|
Bioethics Of Cloning
.... of research that had been ongoing for over 40 years.
Up until now, scientists thought that adult cells could not be “reprogrammed” to behave like a fertilized egg and create an embryo, but the evidence obtained by Dolly’s success prove otherwise. The issues of cloning have been around for a long time, starting with the publication of Joshua Lederberg’s 1966 article on cloning in the American Naturalist, and the publics interest has been perked by many sci-fi books, films, and movies including Aldous Huxley’s 1932 novel “Brave New World,” 1973’s “Sleeper,” the 1978 film “The Boys from Brazil,” and most recently, the movie “Multip .....
|
|
Black Holes
.... reaction occurs and the gases within the star start to burn continuously. The Hydrogen gas is usually the first type of gas consumed in a star and then other gas elements such as Carbon, Oxygen, and Helium are consumed.
This chain reaction fuels the star for millions or billions of years depending upon the amount of gases there are. The star manages to avoid collapsing at this point because of the equilibrium achieved by itself. The gravitational pull from the core of the star is equal to the gravitational pull of the gases forming a type of orbit, however when this equality is broken the star can go into several different st .....
|
|
Surface Area To Volume Ratios In Plants (Arid Vs. Moist Environments)
.... being tested in this experiment. Photosynthetic structures of plants adapted to arid environments have a lower surface area to volume ratio than plants adapted to less dry or moist environments.
Null hypothesis: there are no differences between the wet and dry habitat plants and observed differences are purely a result of chance. The null hypothesis is formulated to be rejected.
Methods:
The methods used to gather data for this experiment were fairly simple. Three plants from an arid environment and three from a moist environment were gathered randomly from the UCLA botany garden. Three photosynthetic structures .....
|
|
Nuclear Energy
.... the potential to be much more harmful than an accident at a coal or gas plant because of the radiation that could be released. An example of this is Three Mile Island in Pennsylvania where there was a partial core meltdown in march of 1979 caused large amounts of radiation to be released into the atmosphere.
Accidents involving US nuclear power plants are very rare. This does not mean that they do not occur. In the early 1980's there was a fire at Yankee Atomic, a nuclear power plant in Massachusetts, destroying over 3 million dollars worth of electrical wiring in the reactor. It was caused by some workmen who were using ma .....
|
|
Ozone Depletion In The Antarctic
.... ozone molecules (Figure 1.2)
During the winter in the Antarctic the circumpolar vortex, which is a strong westerly circulation around the continent, builds in the stratosphere. This phenomenon causes the interior of the stratosphere to be cut off and the temperatures drop below -800C. This results in thin clouds forming and that enables reactions with gases containing chlorine to take place. In the spring the sun returns and the chlorine in the stratosphere begins a series of ozone destroying catalytic chemical reactions creating the ozone hole over the Antarctic. During the late spring and early summer, the stratosphere be .....
|
|
Global Warming
.... the temperature highs and lows have been in tandem with carbon dioxide level highs and lows, this does not seem to be a mere coincidence.
Carbon dioxide currently accounts for 0.03% of the gas content within the atmosphere. However, it has a disproportionate impact on the earth's temperature. Thus, minor fluctuations in the percentage of atmospheric carbon dioxide will likely have a significant effect on the global temperature. The percentage of atmospheric carbon dioxide has risen over the past century at an alarming rate. Industrial civilization essentially driven by fossil fuels such as coal, oil, and gasoline all major co .....
|
|
Nuclear / Particle Physics Effects Of The Atomic Bombs On Hiroshima And Nagasaki
.... more energy to be released. If this process is repeated, a self-sustaining chain reaction will occur, and it is this chain reaction that causes the atomic bomb to have its destructive power (World Book, 1990). This chain reaction can be attained in two different ways.
The first type of atomic bomb ever used was a gun-type. In this type two subcritical pieces of U-235 are placed in a device similar to the barrel of an artillery shell. One piece is placed at one end of the barrel and will remain there at rest. The other subcritical mass is placed at the other end of the barrel. A conventional explosive is packed behind the .....
|
|
Comets
.... this is referred to by astronomers as a jet. Dust that had been mixed in with the gas is also pushed out, and as more jets appear, a small gas and dust shell forms around the nucleus, and this is called the coma.
The coma, also called the head, is a dense cloud of water, carbon dioxide and other gases and comes off of the nucleus. They can be several thousand kilometers in diameter, depending on the comet’s distance from the sun and the size of the nucleus. The size of the nucleus is important because since large nuclei have a greater surface area facing the sun, which is the side that is the warmest, hence the side where .....
|
|
|
