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Why are there ocean ridges and why are plates still moving?

Why are there ocean ridges and why are plates still moving? .
By: Guest
Date: Mon-Sep-24-2012-
Response
0
Upwelling mantle material at ocean ridges produces new oceanic crust. The surface of the earth stays constant over time, so if oceanic plates are subducted new oceanis crust must be produced to fill the void. The plates are still moving, because the earth has still not cooled down. As long as there is a large enough difference in temperature between the core/mantle and outer space, this process will continue.
[d] By: Guest
Date: Mon-Sep-24-2012
Response
What is 1 + 100



Helpfulbox Now Offers Free POS Software

for restaurants, kiosk, and any other retails business completely free. It can be used as windows cashier system or as full blown POS. You will able to print to kitchen, display orders on the kitchen screen, manage inventory, employee, report, customer loyalty offers, employee management, delivery address track and much more, all for free.

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