All About Volcanoes

All about volcanoes!

全都是关于火山的知识哦！

Chapter 1, Mount St. Helens. In 1980, rumbles shook the ground around Mount St. Helens, a mountain in the state of Washington. Scientists watched the mountaintop grow larger and larger. They saw cracks forming, and they knew something big was about to happen. All of a sudden, there was a big boom! The mountaintop exploded with a roar!

第一章 圣海伦斯火山。1980年，隆隆的震动撼动了圣海伦斯火山周边的地面， 这是一座位于华盛顿州的山。科学家们观测到山顶变得越来越鼓。 他们看到裂缝出现，就知道有大事要发生了。突然间， 传来一声巨响！山顶轰隆一声炸开了！

The huge blast destroyed millions of trees. It flattened them like a bunch of sticks. Heat from the blast melted the snow on top of the mountain. The melted snow mixed with dust. It made a thick mud that raced down the mountainside. The mud buried houses, cars, roads and bridges.

巨大的爆炸摧毁了数百万棵树。 爆炸把它们压得扁扁的，就像一堆小树枝似的。 爆炸带来的高温融化了山顶的积雪。 融化的雪和灰尘混在了一起。 混合后形成了浓稠的泥浆，顺着山坡飞快往下冲。 泥浆掩埋了房屋、汽车、道路还有桥梁。

Early warning. Months before the blast, scientists saw clues that Mount St. Helens was about to burst. The police warned people who lived near the mountain to leave their homes. They also warned workers, reporters, and visitors to leave the area. Hundreds of lives were saved because people left before the huge blast.

预警。爆炸发生的几个月前，科学家就发现了圣海伦斯火山即将喷发的线索。 警方警告住在火山附近的居民离开自己的家。 他们还警告工人、记者和游客离开这片区域。 因为大家在大爆炸前就撤离了，数百条生命得以保全。

Chapter 2, How a Volcano Forms Mount St. Helens is a volcano. A volcano is an opening in the earth through which lava, ash, and gases come out. Lava is hot, melted rock that comes from deep inside the earth. Ash is small bits of lava and rock.

第二章 火山是怎么形成的 圣海伦斯火山是一座火山。 火山是地壳上的一个出口，熔岩、火山灰和气体可以从这里喷出来。 熔岩是来自地球深处的滚烫熔融岩石。 火山灰则是熔岩和岩石的细小碎屑。

Gas gets trapped in melted rock inside the earth. The gas escapes when a volcano explodes. Then lava and rocks shoot out. This is a little like shaking a bottle of soda and then opening it. The gas in the soda causes the liquid to bubble up over the top of the bottle.

气体被困在地球内部的熔融岩石里。当火山 爆炸时气体就会逃出来。接着熔岩和岩石会喷射而出。这有点像摇晃 一瓶汽水之后再打开瓶盖。汽水里的气体会让液体 冒着泡泡涌出瓶口。