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Description

Unlike other metals, such as copper or lead, gold is prized for its beauty and scarcity rather than its usefulness. As a metal, it is too soft to use for tools or weapons, and is used mainly as money, in jewelry, and in electronics as a conductor of electricity. This colorfully illustrated new book describes both the basics of this dazzling metal and our fascination with it throughout history. Topics include: - how gold is formed - lode or vein deposits underground and placer deposits in water or dry creek beds - a day in the life of a prospector - gold in history including ancient Egyptian jewelry and alchemists who tried to turn lead into gold in the Middle Ages - the great gold rushes in California, Nevada, the Klondike, Australia, South Africa, and other parts of the world - gold mining methods such as open pit, underground, and hardrock mining - how gold ore is refined - the damage done to the environment by gold mining, such as changing the landscape and wildlife habitats, and waste rock and water pollution from the refining process Teacher's guide available.

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Parties prenantes

Auteur(s) :
Editeur:

Contenu

Nombre de pages :
32
Langue:
Anglais
Collection :

Caractéristiques

EAN:
9780778714132
Date de parution :
15-03-04
Format:
Livre relié
Format numérique:
Bibliotheekbinding
Dimensions :
222 mm x 287 mm
Poids :
408 g

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