25个课本应该要教你的地球真相，身为地球人怎么能不知道？！

1. 由于地球自转的缘故，有些地方的重力比较小，像是加拿大的哈德森湾 (Hudson Bay)。 2. 由于太阳光会被海洋反射，地球远远望去是最亮的一颗行星。廣告1 3. 地球90%的火山在海底下。 (感谢老天！) 4. 俄罗斯的贝加尔湖 (Lake Baikal) 拥有地球

June 14, 2015

編輯：Cora

1. 由于地球自转的缘故，有些地方的重力比较小，像是加拿大的哈德森湾 (Hudson Bay)。

Because of the Earth's rotation, some areas experience less gravity than others. One such area is Hudson Bay in Canada.

2. 由于太阳光会被海洋反射，地球远远望去是最亮的一颗行星。

Because sunlight reflects off of water, Earth is the brightest planet from a distance.

廣告1

3. 地球90%的火山在海底下。

90% of all Earth's volcanos are underwater.

(感谢老天！)

4. 俄罗斯的贝加尔湖 (Lake Baikal) 拥有地球上近1/5的淡水。

Lake Baikal in Russia has nearly 1/5 of all of the fresh water located on Earth.

廣告2

5. 由于自转力量的缘故，地球并不是一颗正圆形。

The Earth is not a perfect sphere. This is due to the force of its spin.

(扁掉了！)

廣告3

6. 海洋中90%的垃圾是塑胶。

90% of garbage in the ocean is plastic.

(汗颜吧！人类)

7. 臭氧层不断在消失，2012年甚至成为近10年最稀薄的一次。

The ozone layer is shrinking and was smaller in 2012 than it had ever been in the last decade.

8. 地球最远的照片是从59亿公里远处拍摄而成。这张照片被称为「黯淡蓝点」(The Pale Blue Dot)。

The farthest picture ever taken of Earth was from 3.7 billion miles away and it has been called The Pale Blue Dot.

(真的很黯淡…)

9. 中国的空气污展在外太空也看得见，澳洲大堡礁一样看得到，但长城不行。

Air pollution in China is visible from Space, as is the Great Barrier Reef. The Great Wall, however, is not.

10. 地球只需要23小时56分钟4秒就可以自转一圈。这被称为「一个恒星日」。

The Earth only takes 23 hours, 56 minutes, and 4 seconds to spin on its axis. This is called a sidereal day.

11. 有3万8千个人造物体绕着地球飞行。

There are 38,000 man-made objects orbiting the Earth.

12. …其中2万2千个超过10公尺大。

22,000 of them are larger than 10 meters.

13. 而且每天至少有一个会掉回地球上。

And every day at least one of them comes crashing back to Earth.

14. 地球97%的水是盐水。

97% of the water on Earth is saltwater.

15. 剩下3%的淡水中，有70%在极地结成冰块。

70% of that remaining 3% is wrapped up in the polar icecaps.

廣告4

16. 其余的大部分在土壤中，或是人类难以汲取的深层地底中。

Most of the rest is either soil moisture or deep underground in inaccessible aquifers.

17. 1公升咸水中包含130亿分之1克的黄金。

1 liter of saltwater contains 13 billionths of a gram of gold.

18. 地球是太阳系中唯一有板块运动的星球，透过板块运动可让「碳」被循环回收，如果少了这些，地球就会像金星一样过热。

Earth is the only planet in the solar system with plate tectonics. Without them carbon would not be recycled and the Earth would overheat, something like Venus.

19. 99%的黄金在地球核心里。

99% of the gold on Earth lies in its core

(现在你知道该去哪里挖宝了吧！)

廣告

20. 地心的温度高达5千5百度，相当于太阳表面温度。

At 5,500 degree, the Earth's core is the same temperature as the surface of the sun.

(残念！黄金挖不到了…)

21. 每年有约有4000万公吨重的沙尘被风从撒哈拉吹到亚马逊。

Wind transports 40 million tons of dust from the Sahara to the Amazon every year.

22. 南极洲的干燥谷 (Dry Valleys) 是地球上最干燥的地方，已经超过200万年没下雨了。

Antartica's Dry Valleys is the driest place on Earth. It hasn't rained there for over 2 million years.

(还好我不住那边…)

23. 在19公里高处会出现「阿姆斯壮极限」(Armstrong Limit) 。由于周遭压力过低，水的沸点会降至接近人类的体温（摄氏37度），所以超过「阿姆斯壮极限」后就必须穿上太空衣。

At 19 km (12 miles) high we encounter something known as the Armstrong Limit. This is where it becomes necessary to wear a spacesuit because due to the low pressure, water boils at body temperature.

(不然眼泪就会…沸腾给你看！)

24. 每天有860万个雷击。

There are 8.6 million lightning strikes everyday.

廣告

25. 我们对宇宙比对海洋和地心清楚，其实，95%的海底世界仍属未探索。

We know more about our universe than we do about our oceans or our Earth's core. In fact, 95% of the world's oceanic territory has still not been explored.</p><br /><br /> <p>Via

(水怪表示：没事不要下来吵我！)

来源：TheChive

原来大家住的地球有这么多我们不知道的祕密！不过有一件事是大家都知道的，那就是「地球只有一个，大家要好好爱护它啊！」。

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