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Earth's surface consists of rigid plates that are

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Manager
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Joined: 25 Aug 2004
Posts: 169
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Earth's surface consists of rigid plates that are [#permalink]

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New post 01 Oct 2005, 15:36
Earth’s surface consists of rigid
plates that are constantly shifting and
jostling one another. Plate movements
Line are the surface expressions of motions
(5) in the mantle—the thick shell of rock
that lies between Earth’s crust and its
metallic core. Although the hot rock of
the mantle is a solid, under the tre-
mendous pressure of the crust and
(10) overlying rock of the mantle, it flows like
a viscous liquid. The mantle’s motions,
analogous to those in a pot of boiling
water, cool the mantle by carrying hot
material to the surface and returning
(15) cooler material to the depths. When
the edge of one plate bends under
another and its cooler material is con-
sumed in the mantle, volcanic activity
occurs as molten lava rises from the
(20) downgoing plate and erupts through the
overlying one. Most volcanoes occur at plate
boundaries. However, certain “mis-
placedâ€
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B
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 [#permalink]

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New post 02 Oct 2005, 00:21
Did this one timed in just under 7 minutes, therefore probably missed one.

D, E, E

OA please
Director
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 [#permalink]

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New post 02 Oct 2005, 21:37
I also get D, E & E.
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New post 02 Oct 2005, 22:06
D E E it is
Manager
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 [#permalink]

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New post 06 Oct 2005, 04:26
OA are D, E and E

Yes, we are missing a question, here we go:

It can be inferred from the passage that a chain of volcanoes created by a mantle plume would most likely be characterized by


A. a curved outline
B. constituent volcanoes that differ from each other in age
C. occurrence near a plate boundary where one plate bends under another
D. appearance near many other volcanic chains
E. rocks with a wide range of chemical composition
  [#permalink] 06 Oct 2005, 04:26
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Earth's surface consists of rigid plates that are

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