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The Precious envelope

Author: Roald Hoffman; Donald Showalter; University of Maryland at College Park.; Educational Film Center (Annandale, Va.); Intellimation, Inc.
Publisher: Santa Barbara, Calif. : Intellimation, 1989, ©1988. ©1988.
Series: The World of chemistry, 17-18
Edition/Format:   VHS video : VHS tape   Visual material : EnglishView all editions and formats
Database:WorldCat
Summary:
In the 1st program the chemistry of earth's atmosphere is examined. Theories of chemical evolution, ozone depletion, and the greenhouse effect are explained. The 2nd program explains where minerals come from and why some elements are common and some rare. Also investigates the abundance of elements and their uses in modern society.
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Genre/Form: Educational television programs
Nonfiction television programs
Video recordings for the hearing impaired
Material Type: Videorecording
Document Type: Visual material
All Authors / Contributors: Roald Hoffman; Donald Showalter; University of Maryland at College Park.; Educational Film Center (Annandale, Va.); Intellimation, Inc.
ISBN: 1559462329 9781559462327
OCLC Number: 21541792
Language Note: Closed captioned for the hearing impaired.
Notes: Title of no. 17 on container: The chemistry of the earth.
A program of the Annenberg/CPB collection.
89-700117 (no. 18).
Credits: Editors, John Fuller, Geoff Dills ; narrator, Fran Dorn ; music, Richard Paul Brier.
Performer(s): Host, Roald Hoffmann ; demonstrator, Donald Showalter.
Description: 1 videocassette (59 min.) : sound, color ; 1/2 in.
Details: VHS format.
Contents: Program 17. The precious envelope --
Program 18. The chemistry of the earth.
Series Title: The World of chemistry, 17-18
Other Titles: Chemistry of earth
Chemistry of the earth
Annenberg/CPB collection.
Responsibility: a production of University of Maryland and Educational Film Center ; producer/writer, John Boslough. The Chemistry of earth / a production of University of Maryland and Educational Film Center ; producer/director/writer, John Ketcham.

Abstract:

In the 1st program the chemistry of earth's atmosphere is examined. Theories of chemical evolution, ozone depletion, and the greenhouse effect are explained. The 2nd program explains where minerals come from and why some elements are common and some rare. Also investigates the abundance of elements and their uses in modern society.

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