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Beverly Libell

Scientists "See" Ocean Floor via Sonar - YouTube - 0 views

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    Ship uses SONAR to see ocean floor- NOAA - intensity of echoes - creating detailed maps of the sea floor. Sonar data combined with visible data. Sonar vs. density, etc.
Beverly Libell

EducatorVids3 - YouTube - 0 views

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    Ten commonly misused words in the English Language
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