书城教材教辅科学读本(英文原版)(套装1-6册)
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第175章 第二册(92)

"It is the most malleable of all the metals," said Fred. "It can be beaten, rolled, cut, and twisted, or worked up into any shape the workman wishes.

"It is for all these reasons, and also because gold is scarce, and therefore valuable, that people like to use it for rings, chains, bracelets, watches, and other beautiful ornaments to wear.

"You should remember that gold, like silver, is too soft to be used alone. Some copper is mixed with it to make it harder.""Teacher told us too," said Willie, "that gold is mostly found not as an ore, but in little round grains, called nuggets. The nuggets are pure gold."SUMMARY

Gold is a yellow metal, with a very high lustre. It is a precious metal; it never rusts, or even tarnishes. It is the most malleable and ductile of all the metals. As it is scarce, it is used for money, and beautiful articles for use and ornament.