human‚ animal‚ and plant life but the amount that we have on earth is negatively affecting our climate. The earth hasn’t held this much carbon for 420‚000 years. Another natural effect of global climate change is through volcanic eruptions. When a volcano erupts it releases aerosols‚ which are a cooling agent for earth. But the volcanoes also release carbon dioxide a green house gas. This may seem like it’s not a problem because the cooling will keep
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eruptive activity. (http://volcanoes.usgs.gov/volcanoes/st_helens/st_helens_geo_hist_101.html) Mt. Saint Helens started to show signs of life after March 16‚ 1980. It began with small earthquakes. On March 27‚ after hundreds of small earthquakes the volcano produced it first eruption in over 100 years. Steam explosions made a 60-70 m wide crater through the volcano’s summit ice cap.
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The Tambora Volcano occurred in Europe in 1815 and did not end until four months later. In fact it spewed so much gases and rock into the air that‚ by the time it stopped erupting‚ it had shrunk by 4‚200 feet. To date‚ Mount Tambora has sent more particles into atmosphere than any other volcano in recorded history. . Mount Tambora sits on island of Indonesia .in 1815‚ perhaps 50‚000 people lived on Sambaw ‚ a beautiful land of rushing streams gentle hills‚ and thick jungles. Looming over the northern
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are How is Lava Produced? And What hazards/dangers does lava pose? It will also study one example of a Lava Flow in Hawaii. Lava is molten rock expelled by a volcano during erupting. It is produced/ formed in the interior of planets including Earth and their satellites. When the lava is first erupted from the vent in a volcano otherwise known as the volcanic vent‚ lava is a liquid and varies from 700°C to 1‚200°C. Although lava is quite viscous‚ it can flow great distances before cooling and
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| * Volcanoes are openings in the Earth’s surface. When they are active they can let ash‚ gas and hot magma escape in sometimes violent and spectacular eruptions. * The word volcano originally comes from the name of the Roman god of fire‚ Vulcan. * Volcanoes are usually located where tectonic plates meet. This is especially true for the Pacific Ring of Fire‚ an area around the Pacific Ocean where over 75% of the volcanoes on Earth are found. * While most volcanoes form near tectonic boundaries
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The Earth is constantly moving. The earth is not stable because‚ the plates are all ways moving.There is different boundaries for the plates in the earth there is convergent‚ Divergent‚ and transform boundaries. The transform boundaries rub together and causes enough friction that when the potential energy lets loose it creates an earthquake. convergent boundaries we’ll come together that can help make mountains because when one plate is more dense than the other plate‚ the more dense plate will
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Energy Source of Natural Hazards Disasters occur where and when the earth’s natural processes concentrate energy and then release it‚ killing and causing destruction. Four energy sources make the earth an active body: 1) the Earth’s internal energy; 2) solar energy; 3)gravity; 4)the impact of extraterrestrial bodies The interior of the Earth holds a tremendous store of heat released primarily from the ongoing decay of radioactive elements. Earth’s internal energy flows unceasingly toward the
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as towering mountains missing a chunk out of the top from which steam‚ ash and lava spew forth. In reality‚ a volcano is any spot on the surface of the Earth where lava flows. Magma finds its way upwards along fissures or cracks in the planet ’s crust and bursts out onto the surface‚ resulting in a volcano. Magma that flows out of a volcano is called lava. If it comes out of the volcano in an explosive ejection — like Mount Vesuvius in AD 79 — it ’s called tephra. The massive destructive power of
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Mount St. Helens erupted on May 18‚ 1980. The volcano‚ located in southwestern Washington‚ used to be a beautiful symmetrical cone about 9‚600 feet (3‚000 meters) above sea level. The eruption‚ which removed the upper 1‚300 feet (396 meters) of the summit‚ left a horseshoe-shaped crater and a barren wasteland. Today the land is healing‚ having recovered its natural beauty‚ but the landscape has been permanently altered. Native Americans in the Pacific Northwest called the mountain "Louwala-Clough"
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ample space to roam and reproduce offspring. Unfortunately the dinosaurs did not last forever since they all mysteriously became extinct. Three of the main theories on how dinosaurs became extinct are climate changes‚ an asteroid impact‚ and massive volcanos erupting. Several scientists believe that global and climate changes may have made the
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