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The Earth is physically zoned from interior to exterior as:
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Inner core-outer core-lower mantle-transitional upper mantleasthenosphere-
lithosphere. |
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According to the theory of plate tectonics, old lithospheric plates are recycled:
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C) in subduction zones,
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The continents are at higher elevation than the oceanic abyssal floor because:
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The oceanic crust has a higher density than the continental crust
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The method by which most heat is transferred through the asthenosphere is:
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Convection,
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The continental basement is mainly composed of:
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Igneous rocks, metamorphic rocks,
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When observing the elevation of the ocean floor across an oceanic fracture zone,
the side with the oldest oceanic crust is _____________ and is ___________ the oceanic ridge segment where the crust was formed. |
Deeper / further away from,
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The initial breakup (rifting) of the large supercontinent of Pangea is often attributed to:
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A) the thermal blanket effect,
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In an amorphous solid, the ions are_____________.
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A) random, but in a stationary position,
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A class of minerals that is commonly produced by crystallization of most types of
magma is the __________ class. |
Silicate,
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In the rock cycle, the formation of igneous rocks can best be related to:
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A) hot spots,
b) plate tectonics |
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The oxygen and silicon in the silica tetrahedra are joined by __________ bonds
which makes them ___________ to breaking across those bonds. |
B) covalent / resistant,
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Very weak, electrostatic bonds that do not involve transfer of electrons are:
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D) Van der Waals,
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Igneous rocks that have a fine-grained crystalline texture were produced by:
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C) rapid cooling of magma (lava) at or near the surface of the earth,
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A structure typical of submarine basaltic (mafic) lava flows is:
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C) pillows,
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The surface of an igneous silicic (felsic) lava that cooled rapidly at the Earth’s
surface would most likely have a(n): |
C) glassy texture,
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