9 A conical volcano

CHENG'S MISSION NOTES A CONICAL VOLCANO Volcanoes are made of rock that once lay deep underground and melted to become magma. When pressure in the Earth forces magma to the surface, it erupts as lava. The cone shape is formed by layers of dried lava that has hardened to form solid rock.

锥形火山火山是由曾经深埋在地下并融化成岩浆的岩石构成的。 当地球上的压力迫使岩浆到地表时，它就会以熔岩的形式喷发出来。 锥形是由干燥的熔岩层形成的，这些熔岩层已经硬化形成固体岩石。

LIFE OF A VOLCANO There are thousands of volcanoes around the world. They are either active, dormant, or extinct. Active volcanoes can erupt at any time, and their magma chambers are full. Dormant volcanoes haven't erupted for a while, but they might become active again. Extinct volcanoes are long dead, and won't erupt again. They have empty magma chambers.

火山的生活世界上有成千上万的火山。 它们要么是活跃的，要么是休眠的，要么是灭绝的。 活火山随时可能喷发，岩浆房充满岩浆。 休眠火山已经有一段时间没有喷发了，但它们可能会再次活跃起来。 死火山是死火山，不会再喷发了。 它们有空的岩浆房。