论文部分内容阅读
火山喷发时的威力真是太大了!光看图片,外福来都觉得震撼。外福来问爸爸:“火山是怎么形成的?那些岩浆都是从哪儿来的?”“这就要从我们生活的地球说起了。”爸爸摆起从头说起的架势,开始讲起来。地球的构造——地壳、地幔、地核地球内部是分层的,从外到内依次是地壳(qiao)、地幔、地核,地核又分外核和内核。最外面一层是地壳,平均厚度约为30~40千米;中间一层是地幔,厚约2900千米,岩浆库就在这一层(地壳漂在地幔上,把我们和岩浆库分开);最里面一层是地核,厚约3450千米(其中外核厚约2200千米,内核厚约1250千米)。
The power of volcanic eruption is really too big! Just look at the picture, outside the blessing to feel the shock. Fuso came to ask Dad: “How did the volcano form? Where did those magma come from?” “This is what we’re talking about from the earth where we live.” "Dad set off from scratch and started Speak up. Earth’s structure - the earth’s crust, the mantle, earth The interior of the Earth is stratified, from the inside to the inside of the earth’s crust (qiao), the mantle, the earth’s core, the earth’s nuclear sub-core and outer core. The outermost layer is the crust, with an average thickness of 30-40 km; the middle layer is the mantle, about 2900 km thick, and the magma reservoir is on this layer (the crust floats on the mantle separating us from the magma reservoir) ; The innermost layer is the core, about 3450 km thick (of which about 2,200 km thick outer core, the core thickness of about 1250 km).