Evolution of the Earth The planet earth has gone through much abuse and punishment in the past. Formed approximately 4.5 billion years ago‚ the earth has undergone multiple catastrophic asteroids erasing species after species. Due to geologic evidence‚ it is estimated over 90 percent of all life that had ever lived in this planet have been extinct. No more than the past 500 million years alone‚ 50-90 percent of all organisms on earth were wiped out of the geological timeline without any warning
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Material: Realms of the Earth Astro-physicists and scientists believe that there could be quite a few planets in the Universe similar to our planet Earth. There is also a probable chance that some form of life prevails and sustains in one of such planet. However‚ so far as we presently know‚ the Earth is the only planet which supports life which makes it a very unique planet. It is therefore imperative (very important and necessary) for us to understand the spheres of the Earth as the spheres play a
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1. Summarize advances over time in determining the age of the Earth‚ including the importance of the discovery or radioactivity. Herodotus counted layers of earth near the Nile River in 450 B.C.E. The Bible was used in the Middle Ages to compute the age of the Earth. The 18th and 19th centuries brought a more scientific look into determining the age of the Earth by studying the salinities of the oceans‚ the rates of sedimentation‚ and models of cooling of different materials in order to calculate
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Chapter 10: Review Questions 3) Seven features of the active sun are: 1. Sunspots: these regions are darker and cooler than the rest of the suns photosphere; they are caused by magnetic fields that protrude at that area of the visible surface. 2. Plages: These are bright areas in the chromosphere. They are associated with magnetic fields emerging from the sun. 3. Solar Flares: these are ejections of large volumes of gas. They can sometimes head our way causing radio interference
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speech my roommate gave on the K-T Boundary. This analysis will consist of the background of the speech‚ Toby’s behaviors‚ and the audience. Without context a speech is meaningless. The context includes the preexisting conditions and the content of the speech. Yesterday I asked my roommate‚ Toby Briggs‚ if he wanted to give a short speech on any topic he chose. He was beyond interested in giving a speech of his choosing. Without delay‚ he chose the topic of the K-T boundary. Toby went
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Atmosphere Homework Describe the composition of the air Air is a mixture of gases and aerosols that compose the atmosphere surrounding Earth. The primary gases of air include nitrogen (78%) and oxygen (21%). Trace gases and aerosols make up the remaining 1% of air. The trace gases include the noble gases argon‚ neon‚ helium‚ krypton and xenon‚ hydrogen and the greenhouse gases. The aerosols are solid or liquid particles having diameters in the region of 0.001 to 10 microns‚ and include dust
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Honors English‚ Period 5 September 12th‚ 2012 Mental Darkness In the Narrative of the Life of Frederick Douglass‚ literacy plays a cathartic role in self- discovery and triggers an insatiable hunger for knowledge. For Douglass‚ learning to read was a life-changing milestone. It opened him to an opportunity to finally experience the light of knowledge when for so long he was shackled in “mental darkness.”
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net/cms/lib/CA01001235/Centricity/Domain/7724/video/Global Warming. Part 4 - Consequences and Climate models.wmv http://www.youtube.com/watch?v=-eLKIWoIWlM • Three factors: human activity (carbon monoxide & other greenhouse gasses)‚ natural external factors (sun‚ volcanoes)‚ and sulfate aerosols. • Sulfate aerosols arise from fossil fuel combustion which has a cooling affect. • Water vapor is a powerful greenhouse gas. • Not all models agree on the outcomes of future climates. • A great concern is sea level
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Heaven on Earth Everyone has that special place where they can go to escape all the pressures and worries of life‚ that wonderful spot where you can go to soothe all your complications and stress. Imagine for a moment what that place is for you. A place that makes you feel complete and captivated. For me‚ the beach is that ultimate place that is unlike any other I have ever experienced. While I am there all my obligations are immediately erased. The moment I step onto the satiny‚ warm sand and
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Earth Day Earth Day is an annual holiday‚ celebrated on April 22‚ on which events are held worldwide to demonstrate support for environmental protection. In 2013 the day is 43 years old. It is now coordinated globally by the Earth Day Network‚[1] and is celebrated in more than 192 countries every year.[2] In 1969 at a UNESCO Conference in San Francisco‚ the date proposed was March 21‚ 1970‚ the first day of spring in the northern hemisphere. This day of nature’s equipoise was later sanctioned in
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