More important than the amount of time Herodotus computed, which turns out to be trivial compared with the age of Earth, was the notion that one could estimate ages of geologic features by determining rates of the processes responsible for such features, and then assuming the rates to be ...
It was the discovery of radioactivity at the end of the nineteenth century that opened the door to determining both the Sun’s energy source and the age of Earth.From the initial work came a suite of discoveries leading to radio isotopic dating, which quickly led to the realization that Eart...
It was the discovery of radioactivity at the end of the nineteenth century that opened the door to determining both the Sun’s energy source and the age of Earth.From the initial work came a suite of discoveries leading to radio isotopic dating, which quickly led to the realization that Eart...
托福考试内容回忆: Attempts at Determining Earth’s Age 早期人们有几种方法可以测算地球的年龄,但是结果不令人满意,因为很多都是基于猜测的。后来有个人发现放射性元素后根据半衰期计算出一块岩石的年龄,这项发现结果惊人,因为岩石的年龄比之前任何一次测算的地球年龄都要久远。但是,另一个科学家发现了一个更加古老的...
Paragraph 1:Since the dawn of civilization, people have been curious about the age of Earth. In addition, we have not been satisfied in being able to state merely the relative geologic age of a roc…
”定位至第四段倒数第二句“Even though in error, Joly's calculations clearly supported those geologists who insisted on an age for Earth far in excess of a few million years.”（尽管错了，但Joly的计算明确地支持了那些坚持认为地球的年龄远远超过几百万年的地质学家的观点。）
Paragraph 1:Since the dawn of civilization, people have been curious about the age of Earth. In addition, we have not been satisfied in being able to state merely the relative geologic age of a rock or fossil. Human curiosity demands that we know act
托福考试内容回忆: Attempts at Determining Earth’s Age 大致内容 By Natural process: deposit rate of sediment,有人通过测海水盐分来计算,尽管可能有问题,但是得出这种方法More ancient than former think很多名人也支持,因为符合他们biology方面的结论。
Paragraph 1:Since the dawn of civilization, people have been curious about the age of Earth. In addition, we have not been satisfied in being able to state merely the relative geologic age of a rock or fossil. Human curiosity demands that we know actual age in years. ...
O Earth's true age, 4.54 billion years, was determined by combining data from the geological and fossil records. 做真题,得高分,好录取。 托福真题网:www.tuofuzhenti.com (复制掉浏览器打开) 答案+we-chat : wutangyufa