Yours

Educational196028 min640×360

Hidden Earth

National Academy of Sciences (U.S.), McGraw-Hill Book Company

EducationIndustrial and advertising

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About

Produced in cooperation with the WGBH Educational Foundation

With teacher's guide

Traces the history of man's endeavors to study the earth's interior and describes modern instruments and techniques. Explains the significance of volcanic eruptions and earthquakes. Discusses theories regarding the origin of the solar system, the changes in the surface of the earth, the earth's heat flow, Operation Mohole, and the value of seismic exploration of the moon

Human-made No record of this work says a model made it. What this means.

Archive
Internet Archive, in Educational films
Licence or status
The Internet Archive states none for this item.
Credit
National Academy of Sciences (U.S.), McGraw-Hill Book Company
Language
English
Who can watch
The archive gives no rating. Invisible Network shows it to Kids profiles and older, judged from its collection and subjects. How films are placed