15.11地球的年龄
章节大纲
-
What is deep time?
::什么是深的时间?We can look so far out into space that it's hard to imagine the distances. We also have trouble imagining the extend of geologic time. This section might help.
::我们可以从远处探索空间, 很难想象距离。 我们也难以想象地质时间的延长。 这部分可能会有所帮助 。Age of Earth
::地球年龄Earth scientists use , index fossils , and other clues. They have determined that Earth is 4.6 billion years old. The planet is the same age as the rest of the solar system .
::地球科学家使用指数化的化石和其他线索。他们确定地球有46亿年的历史。地球与太阳系其他部分的时代相同。Geologic Time Condensed to One Year
::地表时间压缩到一年It's always fun to think about geologic time in a framework that we can more readily understand. Here are when some major events in Earth history would have occurred if all of Earth history was condensed down to one calendar year .
::在一个我们可以更容易理解的框架内思考地质时间总是很有趣的。 此时,如果地球历史全部压缩到一个日历年, 地球历史上的一些重大事件就会发生。January 1, 12:00 am: Earth forms from the planetary nebula – 4600 million years ago
::1月1日 12: 地球由行星星云形成 4600万年前February 25, 12:30 pm: The origin of life; the first cells – 3900 million years ago
::2月25日下午12时30分 2月25日下午12时30分:生命的起源;第一牢房——3 900万年前March 4, 3:39 pm: Oldest dated – 3800 million years ago
::3月4日 下午3点39分 最古老的日期 3800万年前March 20, 1:33 pm: First stromatolite fossils – 3600 million years ago
::3月20日下午1点33分:第一颗天马化石化石——3 600亿年前July 17, 9:54 pm: First fossil evidence of cells with nuclei – 2100 million years ago
::7月17日晚上9点54分, 7月17日晚上9点54分:第一件以核为核心细胞的化石证据,November 18, 5:11 pm: Cambrian Explosion – 544 million years ago
::11月18日下午5点11分:坎布里安爆炸——5.44亿年前December 1, 8:49 am: First insects – 385 million years ago
::12月1日早上8点49分:第一昆虫——3亿8千5百万年前December 2, 3:54 am: First land animals, amphibians – 375 million years ago
::12月2日 凌晨3点54分 第一陆地动物 两栖动物 3亿7千5百万年前December 5, 5:50 pm: First reptiles – 330 million years ago
::12月5日下午5点50分 第一批爬行动物 3亿3千万年前December 12, 12:09 pm: Permo-Triassic Extinction – 245 million years ago
::12月12日下午12:09:Permo-Triassic灭绝——2.45亿年前December 13, 8:37 pm: First dinosaurs – 228 million years ago
::12月13日下午8点37分:第一恐龙——2.28亿年前December 14, 9:59 am: First mammals – 220 million years ago
::12月14日上午9点59分:第一哺乳动物——2.2亿年前December 22, 8:24 pm: First flowering plants – 115 million years ago
::12月22日下午8: 24: 第一批开花植物 — 1.15亿年前December 26, 7:52 pm: Cretaceous-Tertiary Extinction – 66 million years ago
::12月26日下午7点52分: 白鲸-天经灭绝——6600万年前December 26, 9:47 pm: First ancestors of dogs – 64 million years ago
::12月26日下午9点47分:狗的祖先——6 400万年前December 27, 5:25 am: Widespread grasses – 60 million years ago
::12月27日早上5: 25: 广大的草地 6000万年前December 27, 11:09 am: First ancestors of pigs and deer – 57 million years ago
::12月27日,上午11:09:猪和鹿的先祖先——5 700万年前December 28, 9:31 pm: First monkeys – 39 million years ago
::12月28日下午9点31分:第一只猴子3 900万年前December 31, 5:18 pm: Oldest hominid – 4 million years ago
::12月31日下午5点18分: 最老的人类-400万年前December 31, 11:02 pm: Oldest direct human ancestor – 1 million years ago
::12月31日下午11点02分:人类最老的直接祖先——100万年前December 31, 11:48 pm: First modern human – 200,000 years ago
::12月31日下午11点48分 第一现代人类 20万年前December 31, 11:59 pm: Revolutionary War – 235 years ago
::12月31日下午11点59分:革命战争 - 235年前Source :
::资料来源:Watch the following video for another analogy of geologic time.
::观看下一段视频, 以作为地质时间的另一个类比。Summary
::摘要- Earth is 4.6 billion years old. It is also 4,600 million years old.
::地球有46亿年的历史,还有4.6亿年的历史。
- If Earth history is equal to a year, all of human history has taken place in the last 12 minutes.
::如果地球历史等于一年,所有人类历史都发生在最后12分钟。
- The Cambrian Explosion took place on November 18. Life is very recent.
::Cambrian爆炸发生在11月18日,
Review
::回顾- How old is Earth?
::地球几岁了?
- What was the longest major stage in the history of life and what was it?
::生命史上最长的主要阶段是什么? 是什么?
- When did modern humans arise in Earth history?
::现代人类何时出现在地球历史上?
- When did the cell nucleus evolve?
::细胞核什么时候进化的?
Explore More
::探索更多Use the resource below to answer the questions that follow.
::利用以下资源回答以下问题。- When did Earth form in years ago and on the one year calendar?
::地球何时形成于多年前 和一年历上?
- When did the first life appear in years ago and on the one year calendar?
::几年前第一次生命出现在一年日历上是什么时候?
- When did multicellular life evolve in years ago and on the one year calendar?
::多细胞生命何时在多年前和一年日历上演变?
- When did the first plants evolve in years ago and on the one year calendar?
::最早的植物是几年前在一年日历上进化的?
- When did the dinosaurs go extinct in years ago and on the one year calendar?
::恐龙何时在几年前 和一年历上灭绝了?
- When were the Himalayas formed in years ago and on the one year calendar?
::喜马拉雅山是几年前 和一年历上形成的?
- When did the first humans appear in years ago and on the one year calendar?
::几年前和一年历上 第一次出现人类是什么时候?
- When was the end of the last ice age in years ago and on the one year calendar?
::上一次冰河时代是什么时候结束的 是在几年前 和在一年日历上?
- Earth is 4.6 billion years old. It is also 4,600 million years old.
