THEORIES OF THE ORIGIN OF THE UNIVERSE 1. Steady State Theory – based on the perfect cosmological principle that the universe looks the same from any location at anytime. This theory holds that the universe is unchanging‚ it has no beginning and no end. 2. Big Bang Theory – presupposes that the vast universe grew out of something where all matter and energy were compressed to infinite density and heated to trillions of degrees (a beginning which was an immensely small particle of high-density
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The main concepts of the social model of disability originated from disabled people‚ it enables them to have a voice‚ which gives them an opportunity to respond to the medical model. The medical model was introduced by members of the medical professional in 1970. The social model has recognised particular issues experience by disabled people; it highlights their experiences of discrimination‚ in areas such as independent living. The social model aims to remove the barriers that society created.
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advanced. Sprinters use parachutes and run with them to train their legs to get stronger. High jumpers tie weights to the bottoms of their shoes to build their calve strength up. The shoe style today is very colorful compared to the brown and black colors from 1896. There are steps to jumping the high jump and also important factors. One of the important factors is the equipment the athletes have to land on. High Jumpers had to land on sand up until 1960 which affected the jumpers. This affected the jumpers
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Life’s Puzzling Origins The prebiotic soup theory has dominated the thinking about how life has emerged over the past century. However‚ the discovery of extraterrestrial amino acids in the Muchison meteorite in 1970 has widened the scope of this debate. Adding further complexity to the origin of life‚ there is a schism over whether proteins of living cells or the genetic information was a precursor to the other. These debates have raised key questions over which conditions most favored the emergence
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10-21-14 Ms. Stephenson AP Biology Autotrophs vs. Heterotrophs Autotrophic organisms are called “producers” because they create their own food. The word “autotrophic” in Greek means “self-feeding”. Most autotrophs are green plants‚ algae‚ and some bacteria. A small number of bacteria‚ including the ancient Archaea group are capable of generating food from sulfur or other chemical reactions‚ but the majority of autotrophs rely on sunlight to carry out a process called photosynthesis
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Search for Extraterrestrial Life Introduction Mankind has always wondered‚ "Are we alone in the Universe? Isn’t there life out there somewhere?" With an estimate around 300 billion stars in the Milky Way galaxy alone‚ many with their own satellites‚ the possibilities seem likely that some form of life should exist somewhere in the Universe. This search for life begins with a definition of life itself‚ followed by possible candidates both within and outside our solar system‚ and also includes
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day; personal PDFs are available immediately. Origin and Evolution of Earth: Research Questions for a Changing Planet Committee on Grand Research Questions in the Solid-Earth Sciences‚ National Research Council ISBN: 0-309-11718-6‚ 200 pages‚ 8 1/2 x 11‚ (2008) This PDF is available from the National Academies Press at: http://www.nap.edu/catalog/12161.html Visit the National Academies Press online‚ the authoritative source for all books from the National Academy of Sciences‚ the National Academy
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regarding the mystery that is life. What is life‚ and how did it get started? Their responses to these questions has varied over the years as advances in technology have led to new evidence being brought in from a ranging variety of fields. In the summer of 1993‚ J. William Schopf‚ a paleobiologist reportedly found fossilized imprints of microbial communities between layers of rock that were 3.5 billion years old. This‚ along with other evidence indicated that life was well established only a billion
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Life on Earth. 1. Analysis of the oldest sedimentary rocks provides evidence for the origin of life. * Identify the relationship between the conditions on early Earth and the origin of organic molecules. * Scientists estimate that the universe is 10-20 billion years old and arose as a big bang‚ which is still expanding the universe. * The early Earth was very different from the Earth today and no oxygen was present. This means that there was no ozone layer exposing the Earth’s surface
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Orbiting at: 0.05 AU (1AU= distance from earth to sun) 3. Methods o Doppler Spectroscopy - Just like the star causes a planet to move in an orbit around it‚ the planet causes its host star to move - If a star is being orbited by a planet‚ the radial velocity of the star changes as it moves towards and away from the observer. - This back and forth motions causes a shift in the stars spectrum - This is the same effect as an ambulance that moves towards and away from you. - As the planet moves towards
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