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The top documents tagged [echoes of sound waves]
Continental Drift Theory
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In the mid-1900’s, scientists realized that the ocean floor had many mountain ranges similar to those on the continents. These underwater mountain ranges
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THE OCEAN Ocean Zones and the Ocean Floor Text Book pages # 350 - 356
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May 2008US Sensor Calibration1 Ultrasonic Sensors Calibration Omar A. Daud Truc-Vien T. Nguyen May 16, 2008
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What is the world ocean and how is it explored?
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