百度试题 结果1 题目How old is the Earth? A. About 3, 500 million years old. B. About 3, 700 million years old. C. About 4, 600 million years old. D. About 4, 800 million years old. 相关知识点: 试题来源: 解析 C
How Old Is Earth, And How Do We Really Know?Alan Cutler
Planet Earth doesn't have a birth certificate to record its formation, which means scientists spent hundreds of years struggling to determine the age of the planet. So, just how old isEarth? By dating the rocks in Earth's ever-changing crust, as well as the rocks in Earth's neighbors, ...
【题目】How Old Is the Earth(地球)?Do you know how old our earth is ? If you think a little, you will know the earth must be very old.T here are a lot of trees on the earth, aren't there?It takes many years for trees to grow (生长) big andtall. We can tell how old a ...
百度试题 结果1 题目How old is the earth?A. About 3. 5 billion years.B. About 4. 5 billion years.C. About 5. 5 billion years.D. About 6. 5 billion years. 相关知识点: 试题来源: 解析 B
1.The earth is very young.( )2.Any tree is not older than the earth. ()3.We can’t know how old a tree is.()4.A tree is millions of years old. ( )...
How old is planet Earth? People have been trying to figure that out since, well, since the beginning of time. Public Domain Pictures (CCO 1.0) Advertisement Contents How Old is the Earth? Historical Theories of the Earth's Age Radiometric Dating Clair Patterson's Discovery How Old ...
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3. How old Is the Earth? 2019-01-21 14:51:2706:09 138 所属专辑:英语少儿百科讲解版 喜欢下载分享 声音简介地球多老了? 用户评论 表情0/300发表评论 暂时没有评论,下载喜马拉雅与主播互动音频列表 1 9. What makes the Earth shake? 1052019-02 2 8. Do people live on volcanoes? 1532019-02 3 ...
the Earth, seeking the oldest rock formations on the planet. The oldest surface rock is found in Canada, Australia and Africa, with ages ranging from2.5 to 3.8 billion years. The very oldest rock was discovered in Canada in 1999, and estimated to be just over 4 billion years old. ...