At the beginning of the Proterozoic, Earth’s atmosphere was mostly ____
a. oxygen
b. nitrogen
c. carbon dioxide
d. water vapor
e. argon
c
Environmental & Atmospheric Sciences
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What type of continental margin is presently represented by the eastern edge of North America? How did it form?
What types of sedimentation is this margin experiencing? What will be an ideal response?
Environmental & Atmospheric Sciences
About ________ gallons of used motor oil pollutes the sea annually
a. 240 million b. 100 million c. 24 billion d. 100 thousand
Environmental & Atmospheric Sciences
If a liquid with a lower density than mercury were used in a barometer the height of the column in
the barometer would:a. increase. b. decrease. c. remain the same. d. not provide an accurate measure of atmospheric pressure
Environmental & Atmospheric Sciences
The oceans cover about 50 percent of the earth's surface
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences