mountains‚ but they are really flat land that is pushed upward because of the pressure below the earth. The pressure comes from hot magma and gases that build up below the earth’s surface and that work up to the surface through cracks in the earth’s plates. As it is forced up to the surface‚ the gases and magma push the earth up with it forming the mountain shape. When the magma gets near the surface of the earth it sometimes erupts violently‚ but can also erupt without violence. | | A volcano
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Marine Science Through The Years 1914 - (April 27) Reginald Fessenden‚ of Submarine Signal Corporation‚ used a Fessenden Oscillator to reflect a signal off an iceberg and simultaneously reflect an acoustic signal off the sea bottom. 1919 - French scientists succeed in running the first line of soundings obtained from an acoustic echo sounder. 1922 - The USS Stewart runs a line of soundings across the Atlantic Ocean using an acoustic echo sounder devised by Dr. Harvey Hayes. 1924 - The Coast
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region wondering if that was "The Big One". The film then explores the role of the San Andreas Fault‚ where the North American and Pacific tectonic plates are sliding past each other. This fault runs 800 miles in length through the entire state of California‚ and takes a sharp bend about 60 miles from Los Angeles. At the bend the two plates bump and grind against each other which creates strain‚ eventually relived by a series of small to moderate sized earthquakes or one large devastating
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billion years ago. 10. Where divergent plate boundaries form beneath continental masses‚ low areas known as RIFT VALLEYS form. 11. An interval of geologic time not represented by strata in a particular are is a HIATUS. 12. The two basic types of luster are METALLIC and NONMETALLIC 13. The three types of convergent boundaries are OCEANIC-OCEANIC‚ OCEANIC-CONTINENTAL‚ CONTINENTAL- CONTINENTAL. 14. At a mid-ocean ridge spreading center‚ what happens? The plates are moving away from each other. 15
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earth’s crust letting go of its strain and stress. Earthquakes can be defined as a sudden and violent shaking of the ground resulting when the earth’s crust releases pressure that has accumulated over time. Looking more into the study of plate tectonics can help to establish a better understanding of earthquakes. How the Earth stores strain and releases stress along earthquake faults The earth’s lithosphere is constantly moving. As you may know‚ the modern day continents were once
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5.3.3 ELECTRICAL ENERGY a) Design‚ construct and draw circuits containing a number of components- (globe‚ closed switch‚ open switch‚ ammeter‚ voltmeter‚ battery or transformer) What is electricity? A form of energy resulting from the existence of charged particles either statically as an accumulation of charge or dynamically as a current. What is a conductor? Materials that permit electrons to flow freely from atom to atom and molecule to molecule. An object made of conducting material will
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Natural disasters are a devastating‚ but undeniably inevitable part of life and society. Because of this fact‚ many of us tend to believe that they happen as an act of nature‚ purely out of the human control. We need to start realizing that this is far from the truth and it this attitude that is stopping us from learning from our mistakes. The contemporary world inaccurately labels various disasters as ‘natural’ when in fact‚ when looked at more closely; there is an enormous correlation between ‘nature’
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destroy houses‚ roads and fields. Lava can kill plants and animals too. The Mount St Helens volcano in 1980 killed an estimated 24‚000 animals including 11‚000 hares‚ 6‚000 deer‚ 300 bobcats‚ 200 black bears and 15 mountain lions. The theory for plate tectonics‚ which causes the
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situated in a complicated plate boundary region where three subduction zones meet. Two of these subduction zones run parallel to the east coast of Japan. To the south‚ the Philippine plate is being subducted beneath the Eurasian plate‚ whilst to the north; the Pacific Plate is being subducted beneath the North American plate. These rocky plates cover the planet like a giant jigsaw puzzle and creep past one at a velocity of 3.2 inches per year. The release of energy as the two plates move past each other
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for 3 days. The root of the disaster was a shock that happened on the boundary between the Eurasian and the Philippine plate‚ a boundary that runs right beneath Kobe. Kobe lies close to a fault line between the Philippine and South Japan Tectonic plate. The 2 plates are sliding past each other. This is called a passive plate boundary. There is a direct relationship between plate margins and earthquakes‚ throughout the world. Japan is very prone to earthquakes‚ because of the countries special physical
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