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. This
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Save the Earth With all the talk about going green‚ it seems much easier to let the cards fall where they may. What’s easier? Just throwing all the trash into one can‚ or sorting it into separate cans? As hard as it could be to clear the mess that this and past generations have left‚ it would be severely healthier than the alternative. Plutonium is a dangerous toxin that is released from nuclear power plants. “Plutonium‚ which has the half-life of only 0.5 million years‚ but is so toxic that
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Earth Day Some people who talk about the environment talk about it as though it involved only a question of clean air and clean water. The environment involves the whole broad spectrum of man’s relationship to all other living creatures‚ including other human beings. It involves the environment in its broadest and deepest sense. It involves the environment of the ghetto which is the worst environment‚ where the worst pollution‚ the worst noise‚ the worst housing‚ the worst situation in this country
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If the planet earth continues on the path that it is headed for‚ it is predicted that between 2020 and 2029 that we will reach our maximum carrying capability for humans. In 1960 the human population was roughly 3 billion‚ since then it has more then doubled to 6.8 billion and is still rapidly growing. Humans add 1.5 million people to this earth every week. There are 4 main causes for the overpopulation of earth; decline in death rate‚ increase in birth rate‚ migration and lack of education.
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An essay on Earth Day The subject of Earth Day has been covered intensively by the world press over the past decade. Many an afternoon has been enjoyed by a family‚ bonding over the discussion of Earth Day. Until recently considered taboo amongst polite society‚ it is yet to receive proper recognition for laying the foundations of democracy. Often it is seen as both a help and a hinderence to global commercial enterprises‚ who are yet to grow accustomed to its disombobulating nature. Complex though
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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 rise due to melting glaciers‚ can cause coasts from Venice to California to be affected. Extreme Weather: thunderstorm
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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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1. What transitions has Earth gone through and why? The young earth was anything but habitable. Radioactive elements decaying within its mass and impacts from debris raining down form space generated intense heat. There was no life during this era. Is called the Hadean era and was formed about 4.5 billion years ago. Hadean comes from the Greek word Hades which means “Hell”. That’s how hot the Earth’s temperature was. The next phase in the Earth’s history was the Archean era. It existed
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ENGLISH CLASS 2013 PLANET EARTH OUR PLANET TEACHER ERICKA SANTIESTEBAN COLEGIO LA ROCA Earth is the third planet from the Sun‚ and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System’s four terrestrial planets. It is sometimes referred to as the world‚ the Blue Planet‚ or by its Latin name‚ Terra. Earth formed approximately 4.54 billion years ago‚ and life appeared on its surface within one billion years. Earth’s biosphere then
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Unit 5 |1. |Rising air expands and cools; sinking air is compressed and warms. Typically‚ the size of the temperature change is: | | |A. | | |5oF/1000 ft change in elevation going up‚ and 3oF/1000 ft coming down | | |
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