biaplates - Megan Thie 10/25/2007 BIA Earth's Surface Gets...

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Megan Thie 10/25/2007 BIA Earth’s Surface Gets Built Up What Happened? 1. When the North American plate pulls apart from the European plate, trenches and ridges are formed. 2. When the Indian plate moves into the Asian plate, mountains are formed while parts of the plates are pushed down into the earth. 3. When the Nazca plate moves into the South American plate, volcanoes and mountains are formed. 4. When the Pacific plate moves past the North American plate, earthquakes will occur. Why did this happen? (Explanation) 1. The convection cycle occurs inside the earth because the earth’s core is very hot. The rocks that are heated near the center core of the earth become less dense because the molecules within them are moving faster and spreading further apart. These rocks rise towards the surface of the earth. They cool as they rise because they are getting further from the heat source. The molecules within the rocks begin to move slower and closer together. The rocks are now denser and begin to sink. Then the cycle repeats itself. The
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biaplates - Megan Thie 10/25/2007 BIA Earth's Surface Gets...

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