#21 - Extreme snow and ice 极端的雪和冰

1.An ice storm isn't stormy - but it is dangerous.
Cold rain falls onto freezing cold surfaces. The rain freezes solid, forming a thick layer of ice on the ground, trees, and other objects. Ice storms cause 'black ice' - invisible ice on roads that can cause accidents. Ice-laden trees fall down, breaking power lines and cutting off roads.

V Overburdened by the weight of ice from an ice storm, this tree has collapsed across a road. V

2.An avalanche is a massive pile of snow crashing down a mountainside.
Avalanches can happen whenever lots of snow piles up at the top of a slope. They can be deadly if the snow lands on top of mountain walkers or skiers. Sometimes, big avalanches bury whole houses or even whole villages.

V An avalanche thunders downhill in Silverton, Colorado, USA. This avalanche was started deliberately by dropping explosives, in order to make the mountains safer for visitors. V

3.A blizzard, or snowstorm, is even more dangerous than an ice storm.
If you get caught outdoors in a blizzard, it's very easy to get lost. Falling snow fills the air, making it impossible to see. Thick snowdrifts build up, making it hard to walk or drive. People have lost their way and died in blizzards, just a short distance from safety.

V Ice can form beautiful crystal patterns as it freezes across a window or car windscreen. V

4.If you get stuck in a blizzard or avalanche, a hole in the snow can keep you warm.
Snow is a great insulator, as heat does not flow through it very well. If you curl up inside a hole dug in the snow, it traps the heat from your body and keeps it close to you. Many people have survived blizzards by making snow holes.

5.We put food in a freezer to keep it fresh - and the same thing happens in nature.
Snow and ice can stop dead bodies from rotting away. Woolly mammoths that lived 10,000 years ago have been dug out of the ice in northern Russia, perfectly preserved. In 1991, the body of a 5000-year-old man was found in the ice in mountains in Austria. He was nicknamed Ötzi the Iceman.

V A man uses a reindeer sled to collect remains of a woolly mammoth discovered buried in ice. V

冰暴不是暴风雨的 - 但它是危险的。
冷雨落在寒冷的寒冷的表面上。雨水冻结，在地面，树木等物体上形成一层厚厚的冰。冰风会导致“黑冰” - 可能导致事故的道路上看不见的冰。冰载满载的树木倒塌，断电，切断道路。

伏冰由于风暴而重负重，这棵树在一条路上倒塌。 V

雪崩是一大堆雪崩在山腰上。
只要大量积雪堆积在斜坡顶部，雪崩就可以发生。如果雪落在山地步行者或滑雪者的顶部，他们可能是致命的。有时，大雪崩埋葬整个房屋甚至整个村庄。

V在美国科罗拉多州的Silverton，雪崩下坡。这个雪崩是通过放下爆炸物故意地开始的，以使游客更安全。 V

一场暴风雪，或是暴风雪，比一场冰暴更危险。
如果在户外遇到暴风雪的时候，很容易迷路。落雪充满空气，使得它不可能看到。厚积雪堆积起来，难以行走或开车。人们已经失去了路，死于暴风雪，距离安全只有很短的距离。

V冰可以形成美丽的水晶图案，因为它冻结在窗户或汽车挡风玻璃上。 V

4.如果你陷入暴风雪或雪崩，雪中的一个洞可以让你温暖。
雪是一种很好的绝缘体，因为热量不会很好地流过。如果你在雪中挖出一个洞里卷起来，它会从身体中吸收热量，并保持与你的距离。许多人通过制作积雪来幸存下来的风雪。

我们把食物放在冷柜里保持清新 - 同样的事情在自然界中发生。
雪和冰可以阻止尸体腐烂。一万年前生活的羊毛猛have象已经被俄罗斯北部的冰块挖出，完全保存完好。一九九一年，一名五千岁男子的尸体被发现在奥地利山区的冰山。他被昵称为Ötzithe Iceman。

V一个人用驯鹿雪橇收集埋在冰中的羊毛猛mamm象的尸体。 V