Oil refining separates the components of crude oil by ____.

A. weight
B. volume
C. boiling point
D. viscosity
E. color


Answer: C

Environmental & Atmospheric Sciences

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The troposphere is the atmospheric layer where

A. weather occurs. B. ozone absorbs incoming ultraviolet radiation from space. C. the Aurora Borealis occurs. D. temperature increases with altitude.

Environmental & Atmospheric Sciences

In 1960 the ratio of food production to N fertilizer use was 40:15 or 2.7:1. By 2000 the ratio was 1:1. The efficiency of N use in agriculture _____.

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

Environmental & Atmospheric Sciences

Describe what a true blizzard is and how it differs from a ground blizzard

Environmental & Atmospheric Sciences

Earth experiences ice ages partly because there are variations in Earth's

A) greenhouse gas levels. B) sea level. C) seismic activity. D) tilt and orbit.

Environmental & Atmospheric Sciences