Welcome to Essay Galaxy!
Home Essay Topics Join Now! Support

Search Essays:   

Gold

.... stand corrosion. "By at least the fourth millennium BC, gold was found through both placer and vein(lode) mining and by the time of the early cultures from which modern civilization is descended the search for gold was wide spread"(Green 1968). Gold is mainly extracted through mining. It is mainly found in tiny flakes or sands but sometimes is found in nuggets. The largest nugget ever found weighed eight kilograms. "Gold deposits are usually classified as lode, placer, massive or disseminated types .....

[ Download This Essay Now ] Number of words: 925 | Number of pages: 4

Microbiology

.... rickettsiae. A microbiologist is a scientist who studies life forms that can only be observed by means of a microscope. Microbiologists use many criteria to classify bacteria. The Beginning of Microbiology Zacharias Jansen created the microscope. Although Robert Hooke is the one who made it widely known. In 1665 Hooke published a book called Micrographie. It contained his thoughts on chemistry as well as a description and list of uses for a microscope. With this he opened the door to microbiology. .....

[ Download This Essay Now ] Number of words: 2042 | Number of pages: 8

The Planet Mars

.... They’ll use 3 different space ships: A habitat lander, a cargo lander, and a crew transport vehicle. The CTV carries them to the habitat lander. They land on Mars, and do their business. When they’re done, the habitat lander takes them back up to orbit where they meet back up with their CTV, waiting patiently in orbit, that takes them back home. The money issue is being handled in many different ways. The most successful plan so-far is the ThinkMars plan. Students at MIT and Harvard are setting up a .....

[ Download This Essay Now ] Number of words: 755 | Number of pages: 3

Electrolytes

.... ions that are able to conduct electricity, the dissociation of Ionic Compounds, and the Ionization of Polar Covalent Molecular Substances. The Dissociation of Ionic Compounds is where particles are ionically (electrically) bonded together. They already made out of cations and anions, but in their solid state the ions are locked into position in their crystal structure, and can’t move around. When the ionic compound is dissolved into water the water molecules, which are polar,(having a positive and a ne .....

[ Download This Essay Now ] Number of words: 626 | Number of pages: 3

Iron And Rust

.... the iron from corroding. This method is also satisfactory but is also expensive. The most common example of this method is galvanizing, in which iron is covered with zinc. (3) Covering iron with an air proof and also a water proof substance. This method is the least expensive, therefore it is the most common. The forming of rust is known as a chemical reaction. A chemical reaction is defined as a process by which atoms are redistributed, resulting in a change in the molecular composition of the .....

[ Download This Essay Now ] Number of words: 423 | Number of pages: 2

Gold

.... metal is used in many ways including, tooth filling because it doesn't rust away or crack, also it is used for the covering or sealing of an astronaut's helmet. Gold is also a very good conductor of electricity. As you can see, gold is an element that is not only a great gift for someone, but is very usefull if actually put to use. The main drawback to gold is that it is a very precious metal. We dont have an unlimited supply of it. This is why gold today is priced so high and really doesn't drop that .....

[ Download This Essay Now ] Number of words: 316 | Number of pages: 2

The Monkey

.... and feet are prehensile, with, typically, five digits on each, the first (thumb and big toe) being divergent from the others. Commonly, the digits have flattened nails, but those of the marmoset are an exception. Except for the night-roaming durukuli of tropical America, monkeys are active during the day, moving frequently in bands in search of vegetation, birds' eggs, smaller animals, or insects to eat. Monkeys are highly social animals and are often organized in clans headed by an old male; these .....

[ Download This Essay Now ] Number of words: 747 | Number of pages: 3

Triceratops Hottidus: “Horrible Three-horned Face”

.... of the dinosaur species evolve before the Cretaceous- Tertiary extinction 65 million years ago. BEHAVIOR: Triceratops was probably a herding animal, like the other Cartesians. This hypothesis is supported by the fining of bone beds, large deposits of bones of the same species in am area. Triceratops hatched from eggs, which may have been cared for by adults. Which threatened by predators, Triceratops probably changed into its enemy, like the modern-day rhinoceros does. This was probably a very .....

[ Download This Essay Now ] Number of words: 452 | Number of pages: 2

Compressed Gas: Helium

.... of gases in the normal breathing process, the blood stream absorbs oxygen from air in the lungs, while carbon dioxide passes from the blood to the air. When you hold your breath, the exchange of gases slows, as "stale" air in the lungs is no longer replaced by "fresh" air. Oxygen is actually removed from the blood stream during the exchange of gases. depending on how completely oxygen is replaced by helium, you may lose consciousness quickly and without warning - you may literally pass out whil .....

[ Download This Essay Now ] Number of words: 925 | Number of pages: 4

The Problem With The Amount Of Trash In The United States

.... each year and we need to put a stop to this. Trash is not a problem far from us, it is right here in our community. People are throwing things on the floor all the time and recycling has not been done as much as it should be. In New York city we have one of the world’s most largest and most crowded landfills which is proven in the article. Fresh Kills landfill, on Staten Island is extremely big but will be closed in a few years. I New York State there were 1600 landfills in the 1960’s and today .....

[ Download This Essay Now ] Number of words: 498 | Number of pages: 2

Power Of The Atom

.... a horses. Something needed to be done. It took way too long to get into contact with people, and it took the same amount of time to get a response. In 1886, a man by the name of Alexander Graham Bell developed an interesting object, that gave you the capability of talking live with one person, other then yourself. This object later became known as the well respected telephone. Although when Bell first invented the phone there were many kinks that needed to be worked out. And over time, after being cons .....

[ Download This Essay Now ] Number of words: 718 | Number of pages: 3

The Positive Effects Of DDT

.... altogether. It has been repeatedly proven that DDT does not cause any form of cancer in humans. Contrary to what environmentalist attacks on the pesticide have alleged, the benefits of DDT far exceed the flaws. DDT was first synthesized in 1887 and patented as an insecticide in 1939 by a Swiss chemist, Dr. Paul Müller (Whelan 69). It initially became popular because of its effectiveness against insects, specifically clothes moths and parasites of both animals and plants. DDT was welcomed as a su .....

[ Download This Essay Now ] Number of words: 1889 | Number of pages: 7

Nuclear Weapons And Their Hazards

.... Like in On The Beach, all the radiation move towards Australia and everyone innocent people died. A large-scale nuclear war would lessen food production over large expanses in the Northern Hemisphere, this could occur through acute climatic conditions which chilling or freezing temperatures occurring for brief periods during the growing season which could destroy crops or lower production. As result of the variety of potential physical and societal disruptions to agriculture from a large-scal .....

[ Download This Essay Now ] Number of words: 827 | Number of pages: 4

Human Impact On Air And Climate

.... but which are not part of the climate system itself. Based on statistical comparisons of reconstructed northern hemisphere temperatures, the best estimates indicate that natural changes in the brightness of the sun and volcanic emissions both played an important role in governing climate variations over the period studied. But over the past few decades, greenhouse gases produced by human activities appear to have had an increasing influence on temperatures. "The anomalous warmth of several recent yea .....

[ Download This Essay Now ] Number of words: 851 | Number of pages: 4

The Shrew

.... were about 2.5 cm round, from 25 cm to 1.5 m long, and not more than 20 cm below the surface. Each burrow has a large area at the end for the nest which was composed of shredded grass. These nests were used for young or as a resting place for groups of adult shrews. Compared to most types of shrews, the least shrew is sociable, and several may be kept together in captivity without conflict. They sleep together and help eachother to some degree in digging tunnels and finding food. One nest found in Decem .....

[ Download This Essay Now ] Number of words: 549 | Number of pages: 2

« prev  4  5  6  7  8  next »


 Copyright © 2003 Essay Galaxy.com. All rights reserved