What are the origins of life on Earth? This question has been highly debated by scientists for a long time. Scientists are trying to determine what makes Earth so unique that life thrives here but in no other planets that we are aware of. There are several theories that scientists have proposed in trying to determine the origins of life on Earth. Some theorize that life derived from an extraterrestrial source‚ others believe autotrophs were the source‚ and other groups hypothesizes that heterotrophs
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The Earth is one of eight major planets and a host of minor planets that circle a fairly average‚ middle-aged‚ main-sequence star. It formed from the accretion of residual material from the gravitational collapse of the solar nebula that produced the Sun. Based on their specific distances from the Sun‚ the planets formed into groups of similar chemical compositions‚ sizes‚ and densities. The four smaller inner planets are of higher density and are composed of a mixture of rock and metal. In contrast
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AP/IB 11 Biology Origins of Life on Earth There are multiple theories as to how life began on earth‚ beginning with the findings of various revolutionary scientists. This paper will discuss various scientists’ theories and experiments as they strove to discover how life began‚ and the processes that might have occurred in order to develop and create the world we are now familiar with today. Recent discovered functions of RNA have suggested that RNA provides a crucial framework in the evolution
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Origin of Earth and Evoluation of the Environment MODULE - 1 Environment through Ages 1 ORIGIN OF EARTH AND EVOLUTION OF THE ENVIRONMENT We live on a beautiful planet called earth‚ along with a wide variety of plants‚ animals and other organisms. Our earth‚ however‚ is part of a vast universe. The universe is about 15 to 20 billion years old. The age of the earth is approximately 4 to 5 billion years‚ while human beings evolved only around 2 million years ago. In this lesson‚ you shall learn
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The Origin of the Earth‚ One of God’s Hidden Secrets “Much of geology is pure speculation and is as such on the same basis as philosophy‚ or must be accepted on faith‚ as the truths of theology” (Rehwinkel 177). For geologists this means that any theory of how the Earth‚ atmosphere and life originated‚ takes faith to believe‚ whether it is the evolutionist’s view or the creationist’s view. Creationists believe that the Earth was created 6000-7000 years ago. This number is based on what the Bible
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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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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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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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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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Humans have always been wildly fascinated about the possibility that extraterrestrial life could‚ does currently‚ or has existed elsewhere in the universe. This is a subject that has been questioned by humankind for at least 2000 years. Lucretius‚ a Roman poet from the first century B.C.‚ had suggested that “just as life originated by spontaneous chemical interactions on Earth‚ ‘we must acknowledge that such combinations of other atoms happen elsewhere in the universe to make worlds such as this
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