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1 地球的年龄地球何时形成?至今有多少年?她能“活”多少岁?这是人类最早探索的课题。经过千百万人的不懈努力,他们先后用“生物化石法”、“太阳能散失法”、“温度梯度法”、“盐浓度法”、“元素半衰期放射法”、“陨石年龄法”等不同方法终于推断出地球的年龄现在有46亿岁,她可以活到大约100亿岁,目前正处于中年期。 2 地球的演变及最重要演变期地球的演变历史是极其漫长的,随着人类社会的
1 When is Earth’s Earth formed? How many years has it been? How many years can she live? This is the earliest human exploration issue. After millions of people’s unremitting efforts, they have successively used “biological fossil method”, “solar energy dissipation method”, “temperature gradient method”, “salt concentration method”, “elemental half-life radiography ”, “ Meteorite age method ”and other different methods finally concluded that the Earth’s age now 4.6 billion years old, she can live to about 10 billion years old, is currently in middle age. Evolution of the Earth and Evolution of the Earth During the Most Important Evolution The history of Earth is extremely long, with the development of human society