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Chapter5.The Earth - The Earth Chapter 5 1 2 Our Living...

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1 The Earth The Earth Chapter 5
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2
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3 Our Living Earth How is Earth different from the other planets of the Solar System?
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4 The Earth Radius = 1 R E =6378 km Mass = 1 M E = 5.98x10 24 kg Density = 5.52 gm/cm 3 Atmosphere = O 2 (21%), N 2 (78%) Pressure = 1 bar Surface features = oceans, craters, mountains, volcanic peaks Sidereal Day = 23.9345 hrs Solar Day = 24 hrs Satellites = 1 Dist. from Sun = 1 AU Orbital Period = 365.26 days Axial tilt = 23.5 o
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5
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6 S P
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7 Types of Waves P -waves : primary waves, travel faster, longitudinal in nature (like sound) S -waves : secondary waves, shear waves, cannot pass through a fluid; transverse (like waves on a string, light)
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9
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10 Differentiation
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11 Radioactive Dating
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12
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13 Tectonically-Active Sites
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14 Continental Plates
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15 Continental Drift
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16 Earth’s Magnetic Field Dipole Field dominates.
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17 Magnetic Anomalies
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18 Sea Floor Spreading or Oceanic Rift underwater along the center of the Atlantic Ocean Satellite measurements confirm that the Atlantic is opening at about 2 cm per year and that the Pacific is slowly closing
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19 The mantle movement acts like a conveyor belt forcing the movement of the plates of Earth. In some locations the plates
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