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Mountains, Volcanoes,and Earthquakes
The Earth has three distinct layers. The crust, mantle, and core. The outer one is the crust. It is very thin and it’s made out of rock. The mantle is beneath the crust and it is solid. The core is the center of the Earth. It is made out of iron and molten rock.
The crust is cut into many pieces called plates. There are 12 major plates. Even though these plates are huge they actually float on the mantle. But they only move a few centimeters a year. The movement of one plate could affect another plate. When two continental plates collide they make mountains. When a continental plate collides with one oceanic plate volcanoes are formed. When two continental plates separate they make new land. When two oceanic plates separate they make volcanoes and new sea floor. When two plates pass each other they make earthquakes. Over 1 million earthquakes happen a year, most of them small ones you can’t even feel.
Article posted April 1, 2008 at 12:39 PM •
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I really liked the info.
Comment Posted on April 2, 2008 at 02:23 AM by
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I am Raami. I am in fifth grade. I like math and computer.
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