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Search results 25361 - 25370 of 30573 matching essays
- 25361: Segregaton in the United States
- Segregaton in the United States Segregation has existed in the United States of America (U.S.) from its beginnings. Gorge Washington a crop owner and first President of the U.S. had many slaves to work on his plantation. In later years slavery was abolished from the northern states. Slavery was a main factor in the Civil War. During that war Abraham Lincoln's Emancipation proclamation declared slaves free in the still rebellious Confederate states, which led to the Thirteenth Amendment (the abolition of slavery). Later the fourteenth and fifteenth amendment were passed to ensure that African- Americans ...
- 25362: Acid Rain
- The Effects of Acid Rain on Lakes and Trees Acid rain has long been argued by society’s most formidable minds. It indirectly destroys ecosystems that surround forests and lakes (Taylor, 26). People need to make decisions dealing with the destruction of nature and the role acid rain plays in it. Acid rain ... their leaves, buds come instead, this process is called a panic shoot (M. 15). Large land areas which used to be covered with forests are now gone, dead or dying (Baines, 21). Around the 1980’s more than half Kotto 2 of the trees in Germany had signs of acid rain damage (Edmonds, 14). Now it is known that acid rain is one of the biggest contributing factors in the death and deterioration of nature. Lakes support thousands of species of marine life, that’s why it’s a shame that they are constantly being poisoned by acid rain. Scientists have studied the effects on acid rain in lakes for several decades (Lucas, 49). Scientist use their observations to ...
- 25363: European Settlements
- ... the queen, was sent out the same year by Sir Walter Raleigh and arrived at Roanoke Island in 1585. More settlers came two years later, but by 1591--their supplies having been interrupted by England's war with Spain--all the colonists had died or disappeared. After a few other false starts, on December 20, 1606, the London Company, established by Shakespeare's patron, Henry Wriothesley, third earl of Southampton, sent out three ships--Susan Constant, Discovery, and Goodspeed--carrying 143 adventurers, most of them, according to the 18th Century Virginia writer William Byrd, "reprobates good families." The ... to Virginia, married Pocahontas, daughter of the chief Powhatan, a union that led to a period of peace with the Indians. Under the leadership of Sir Thomas Dale and Sir George Yeardley, De La Warr's successors as governor, the colony began to prosper. The House of Burgesses was found in 1619; that same year saw the importation of the first slaves to labor in the tobacco fields. In 1622, ...
- 25364: Aztec Civilization
- The Aztec Indians created a great civilization in Central Mexico, reaching its peak in the 1500 s. Being late arrivals to the area, and because of their strong neighboring nations, they were forced to live in the swampy western areas of the Lake Texcoco. Because of the swampy surroundings, the Aztecs used ... in the swamps. These islands are called chinampas, or floating gardens, and were used as farming lands. On these fertile islands they grew corn, squash, vegetables, and flowers. Being an agriculturally dependant empire, the Aztec s religion was based highly on the forces of nature and worshipped them as gods. The god of war, Huitzilopochtli, was the most important deity. They had many other important gods, such as Tlaloc, the god ... their religion. There are many brightly colored murals and paintings on walls and on bark which depict religious ceremonies, along with large idols of gods. One of the most amazing and famous of the Aztec s art works is a huge calendar stone that weighs 22 tons and is 12 feet in diameter. On the stone is a picture of what the Aztecs thought the universe was like. The sun ...
- 25365: Human Evolution and the Fossil Record
- ... argon-40 is a gas, it is released. The ratio of argon-40 released to potassium-40 still present allows for a date to be assigned to objects near the sample. However, due to potassium's high half-life (1.3 billion years), it is only useful as a dating technique for finds older than 500,000 years old. Also, it is only useful where volcanic activity existed. Both these methods ... size of 21 percent and 43 percent, respectively, over [A. africanus and A. afarensis],"(Turnbaugh, 288) with an average cranial capacity of 650 cm3. Skulls found of this hominid also feature a bulge of "Broca's area," an area essential for human speech. It was also taller than the previous hominids, averaging around 5 feet high. At about the same time as Homo habilis and some of the other Homo species ... volume. Also known as a "cc." cranial volume - also, "cranial capacity," or "skull capacity." Refers to the volume of the area within the cranium, which is a rough (but not exact) indicator of an organism's brain size. cranium - the skull, referring especially to its upper section, which held the brain. hominid - a human- like species. Hominids are identified by the ability to walk upright, and a general internal structure ...
- 25366: Hammerhead Sharks
- ... about the use of the hammer. The hammer is a complex structure and probably serves more than one function. The most important function of the hammer according to scientists is increased electroreceptive area and it's sensory perception. This means that the hammerhead has a remarkable sensory ability to detect the small electrical auras surrounding all living creatures. Under certain conditions, such as in searching for wounded animals, the electrical activity increases helping the hammerhead to feed. It is also believed that the hammerhead may be able to use the Earth's magnetic field as a source for navigation. Some hammerheads migrate a lot and may rely on this built in compass sense to guide them in the open ocean. Another use for the hammer is to enhance maneuverability. The hammer's similarity to a hydrofoil seems to explain its usefulness for maneuverability and improved lift. However, this theory has not been tested. Sharks generally have a small brain in comparison to their body weight. Among ...
- 25367: Animalia Vertebrata Mammalia Carnivora Canidae Canis Lupus And Animalia Vertebrata Mammalia Carnivora Canidae Canis Niger
- ... Animalia Vertebrata Mammalia Carnivora Canidae Canis Niger Introduction: Any person who has been able to catch a glimpse of any type of wolf is indeed a lucky man. The wolf is one of the earth's most cowardly and fearful animals, and it is so sly and, pardon the expression, foxy, that it is almost a waste of time to try and catch him in any kind of trap. Although he ... their prey. This leaves them helpless and unable to move. Then the wolf pack can eat and tear him apart at their own will. Although savage and bloodthirsty, wolves are among some of the world's smartest and most perceptive mammals. Where found: Wolves are found all over the world, and on almost every major continent of the earth. The following wolves are types of Gray Wolves (Canis lupus). In eastern ... manner in which wolves is what is known as the "conversation of death." Wolves often test large prey, and in approaching whatever this might be, a moose, caribou, elk, or bison, they engage their prey's gaze with a sober stare. Man has no been able to translate this "phenomenon" any more than he has been able to translate the meaning and significance of howling. However, it has been suggested ...
- 25368: Family, Marriage, and Gender Roles
- Family, Marriage, and Gender Roles At the core of American identities and American dreams lies a family. Throughout time, families serve as a connection between the individual and the outside world. The individual's identity, his or her dreams, in large part depend on the family of origin or a family of choice. The individual is shaped through beliefs, values, and assumptions that the family holds about the world and that are based on family member's experiences and collective memory. The family itself, in turn derives its values from the social, cultural, political, and philosophical assumptions and beliefs of the larger, and more dominant culture. In today's modern society, assumptions regarding a family can be very widespread. Ranging from the conservative viewpoint to the more liberal view. The conservative is the more traditional view of the two. Believing that the only ...
- 25369: Essay on Evolution
- ... is also evidence to prove that these mechanisms are valid and have helped create the genetic variety of species that exists today. Antibiotic resistance in bacteria is one example of evolutionary evidence. In the 1950's, Japanese physicians realized that a antibiotic given to patients who had a infection that caused severe diarrhea was not responding. Many years later, scientists found out that a certain strain of bacteria called Shigella contained ... the genome. Then the DNA fragments are separated by electrophoresis and compared to the other DNA fragments of the other species. This technique has been used to compare mtDNA from people of several different ethnicity's to find out that the human species originated from Africa. The most precise and powerful method for comparing DNA from two species is DNA sequencing which determines the nucleotide sequences of entire DNA segments that ... best method for determining the age of rocks and fossils on a scale of absolute time. All fossils contain isotopes of elements that accumulated in the organisms when they were alive. By determining an isotope's half-life which is the number of years it takes for 50% of the original sample to decay, it is possible to determine the fossil's age.
- 25370: Fireside Chat
- ... Hoover, reacted poorly to the stock market crash of 1929. He misjudged the intensity of the collapse, calling it “a needed adjustment” and stated that by his standards, the American economy was fundamentally sound. Hoover’s hands-off policy towards the economy drove our nation deeper into the depth of depression. He felt that no federal action of any kind was needed to stabilize the economy. Hoover also felt that the ... government should never supply aid of any kind to the poor, unemployed, and the hungry. His administration upheld the belief that welfare would destroy the character of the American people. Near the end of Hoover’s disappointing term in office, he signed a law creating the Reconstruction Finance Corporation. This organization could loan up to 2 billion dollars to banks, insurance companies, and railroads. Hoover’s last ditch attempt to help the economy was too little, too late. Our economy was in shambles and now we need someone to pick up those pieces. As your newly elected president, my administration ...
Search results 25361 - 25370 of 30573 matching essays
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