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