A probable interpretation of migmatites is that they represent:

a. sequences of basalts metamorphosed at mid-oceanic ridges
b. zones of low-level metamorphism of sedimentary rocks over large areas
c. zones of high-level metamorphism of sedimentary rocks produced by plate collisions
d. transitional zones containing mixed igneous and metamorphic rocks located between granitic batholiths and regionally metamorphosed rocks


d

Environmental & Atmospheric Sciences

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What occurs at mid-ocean ridges?

A. oceanic crust is created B. continental crust is created C. continental crust is destroyed D. oceanic crust is destroyed E. all crust is destroyed by magma

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In order to cover such large expanses of seafloor, shield volcanoes erupt ________ lava

A) rhyolitic B) andesitic C) porphyritic D) basaltic

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Over the north Pacific Ocean, midlatitude cyclones approaching North America

A) enter along western Canada and Alaska during summer and along southern California and Baja California during winter. B) enter along western Canada and Alaska during winter and along southern California and Baja California during summer. C) enter along western Canada and Alaska during both summer and winter. D) enter along southern California and Baja California during both summer and winter.

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What are the characteristics of life that allow it to influence the environment at a global scale?Fundamental characteristics of life are as follows:

a. Life spreads exponentially b. Life needs energy c. Life pollutes d. Life is versatile What will be an ideal response?

Environmental & Atmospheric Sciences