The formation of ____ begins when ultraviolet radiation (at wavelengths of about 0.31 µm and below) dissociates some of the ozone into molecular oxygen and atomic oxygen

a. water vapor
b. the hydroxyl radical (OH)
c. sulfur dioxide
d. acid rain
e. dry deposition


ANSWER: b

Environmental & Atmospheric Sciences

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Which of the following is not a branch of the Indo-European family?

A) Indo-Iranian B) Germanic C) Balto-Slavic D) Romance E) Dravidian

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Seedless vascular plants evolved which of the following features of modern plants?

A)seeds only B)roots only C)leaves only D)secondary growth only E)roots, leaves, and secondary growth

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Sedimentary rocks made up of alternating thin layers of chert and iron minerals, mostly the iron

oxides hematite and magnetite; these deposits are ore minerals from which iron is extracted:a. banded iron formations (BIFs) d. evaporites b. limestones e. blue-green algae c. sand dunes

Environmental & Atmospheric Sciences