The most widely used nonmetallic minerals are

a. nitrates and phosphates
b. aluminum and steel
c. carbon and chlorophyll
d. sand and gravel
e. rock and ore


D

Environmental & Atmospheric Sciences

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Stabilized sand dunes:

a. have only been found on Mars. b. are protected from erosion by a surface salt crust. c. are protected from erosion by a surface clay pan. d. are anchored by yardangs. e. are anchored by vegetation.

Environmental & Atmospheric Sciences

An organism occupying the 3rd trophic level is best described as a ________

A) tertiary consumer B) keystone species C) predator D) top carnivore E) secondary consumer

Environmental & Atmospheric Sciences

In a Lewis structure, which of the following atoms can have more than eight electrons associated with it?

A) C B) O C) S D) none of these

Environmental & Atmospheric Sciences

The structure of an ice crystal is mostly determined by the ________ and ________ profiles in the atmosphere

Fill in the blank(s) with the appropriate word(s).

Environmental & Atmospheric Sciences