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The Forever Moving Land
Part 1 of Paper
.... 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 convection current in the mantle drives plates
around either against or away fr.... Part 2 of Paper
....ection in the mantle (Figure 1). Convection is caused by
non-uniform temperature in a fluid and density differences. This continuous
convection is the cause of plate movement. Each complete cycle, 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 .... |
| Number of words: 2829 - Approximate pages: 11 |
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