The most important source of the free oxygen in our atmosphere is:
A) green plants that carry on photosynthesis.
B) the dissociation of water vapor in the upper atmosphere.
C) deforestation.
D) volcanic degassing.
A
Environmental & Atmospheric Sciences
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Carbonic acid forms when carbon dioxide reacts with rainwater.
Answer the following statement true (T) or false (F)
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Cyclic Global Change results in repetition of the same steps over and over, and the same results should repeat as well.
a. true b. false
Environmental & Atmospheric Sciences
A superior image
A) forms when images are displaced upward. B) forms when there is one largest image in a group of images. C) forms when one image is an exact replica of a true feature. D) all of these
Environmental & Atmospheric Sciences
The ________ is the zone above the water table.
A. saturated zone B. permeable zone C. discharge zone D. replenishment zone E. vadose zone
Environmental & Atmospheric Sciences