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The Forever Moving Land
Beginning of paper
The land below us is always in motion. Plate tectonics studies these
restless effects to give us a better understanding of the Earth and its past.
New molten rocks are poured out in the form of magma from the mid-ocean ridges.
The rock is recycled and re-entered back into the earth in deep ocean trenches
through convection current. The convectio ....
Middle of paper ....called a
convection cell, drives the plate in the direction of the cell. How does a
'solid' mantle move? The mantle may be solid but, as with most solids, it will
deform if long term stress is applied; "...like Silly Putty which seeps into
the rug when left unattended, mantle material flows when subjected to small
long-term stresses."1
Presentl.... |
Word count: 2829 |
Page count: 11 |
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