1 Earthquake

Natural Disasters Earthquake! by Marion Dane Bauer illustrated by John Wallace

自然灾害地震！由马里昂·戴恩·鲍尔绘制，约翰·华莱士绘制

Did you know the ground we stand on is moving all the time?

你知道我们脚下的地面一直在移动吗？

Usually it moves as slowly as your fingernails grow. It moves so slowly, the ground seems to be perfectly still.

通常它的移动速度和你指甲的生长速度一样慢。 它移动得很慢，地面似乎完全静止。

Sometimes, though, the ground moves suddenly. Then the movement is called an earthquake.

不过，有时地面会突然移动。 这种运动就叫做地震。

How can the solid ground quake? Let us look at the way our world is made.

坚硬的地面怎么会发生地震？ 让我们来看看我们的世界是如何形成的。

The Earth is round like a ball. Deep inside the Earth is a core. The inside of the core is very hot solid metal. The outside of the core is hot liquid metal.

地球像球一样圆。 地球的深处有一个地核。 地核的内部是非常热的固体金属。 核心的外面是热的液态金属。