spots‚ less than one kilometer in others. Underneath it is the mantle‚ a layer of rock some 2700 kilometers thick that accounts for the bulk of the Earth. The crust is primarily made of granite and basalt while the mantle beneath is made of peridotite. More about all that below. How We Know the Earth Has a Crust Just a century ago‚ we didn’t know the Earth has a crust. Until the 1900s all we knew was that our planet wobbles in relation to the sky as if it had a large‚ dense core. Astronomical observations
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begins to increase with altitude‚ and this trend continues in the thermosphere. Because the atmosphere in the thermosphere is so thin‚ a thermometer cannot be used to measure the temperature accurately and special instruments are needed. The Earth interior is divided into 4 layers. The properties of the Earth’s interior have been inferred primarily from earthquake waves. Distinct characteristics are found within each layer such as density‚ temperature‚ and pressure. OBJECTIVE: In this
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Dangers of Daylight Savings Time Time is a valuable necessity that is not meant to be wasted for we do not have the power to extend or shorten it. As such‚ the issue of time management has appeared to be a problem for many people in the United States and other parts of the world. In the twentieth century‚ the United States adopted a new schedule for managing time also known as daylight savings. This new system would put clocks back an hour in the fall and forward an hour in the spring. At the beginning
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of the Moon’s origin? The currently accepted hypothesis for the Moon’s origin--which is supported by chemical analysis of Moon rocks--is that it began as part of Earth but was blown off when the early Earth was struck by a Mars-sized early planet (retroactively named Theia). Huge amounts of debris were ejected into orbit around the Earth‚ where most of it coalesced into the Moon. The other moons in the solar system have different origins. The small ones are mostly captured asteroids‚ I think‚ while
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saving the Pacific Salmon English 101 4/26/2011 Saving the Pacific Salmon Salmon are one of the most important fish species in the world‚ and in the Pacific Northwest the fish are a way of life for many species of plants and animals‚ including humans. The major problem that humans are facing is that the population of wild salmon is dangerously low as compared to historic numbers due to over-fishing and human degradation (including dams‚ chemical pollution and land use impacts.). Pacific Salmon
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12 Literary piece that have Influenced the World 1. The Bible or the Sacred writings: This has become the basis of Christianity originating from Palestine and Greece 2. Koran: The Muslim bible originating from Arabia 3. The Iliad and the Odyssey: These have been the source of Myths and Legends of Greece. They were written by Homer. 4. The Mahabharata: The Longest epic of the world. It contains the history of religion in India. 5. Canterburry: it depicts the religion and customs of
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Earth’s Rotation Earth ’s rotation is the rotation of the solid Earth around its own axis. The Earth rotates from the west towards the east. As viewed from the North Star or polestar Polaris‚ the Earth turns counter-clockwise. The North Pole‚ also known as the Geographic North Pole or Terrestrial North Pole‚ is the point in the Northern Hemisphere where the Earth ’s axis of rotation meets its surface. This point is distinct from the Earth ’s North Magnetic Pole. The South Pole is the other point
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Saving a/c savings Bank Accounts are meant to promote the habit of saving among the citizens while allowing them to use their funds when required. The main advantage of Savings Bank Account is its high liquidity and safety. On top of that Savings Bank Account earn moderate interest too. The rate of interest is decided and periodically reviewed by the Government of India. Presently‚ the rate of interest is 3.5% compounded half yearly. Savings Bank Account can be opened in the name of an individual
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Salt of the Earth Flannery O ’Connor ’s novels and stories are inhabited with unique and flawed characters who are the result of O’Connor ’s satiric worldly perspective. While they are sometimes humorous‚ these misfits are usually unpleasant. Critics have termed them "grotesque‚" but O ’Connor has rejected this term because it suggests that the characters are too weird to belong in the real world. Instead‚ O ’Connor insists that the South is inhabited by many such people. For every good or evil
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Pilipinas Observes Sight Saving Month Alagaan ang Mata mula Bata Hanggang Pagtanda By Argeline Quiason and Rey Emmanuel Quiason All over the world‚ about 285 million are visually impaired with 39 million totally blind and the reset with poor vision‚ according to the WHO. In the Philippines‚ no exact figure is available but a survey in 1995 showed that more that 1.2 million Filipinos are either totally or partially blind in one or both eyes. Visual Impairment is not‚ however‚ limited to blindness
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