Prior to the Industrial Revolution, the concentration of carbon dioxide in the atmosphere oscillated between 180 and ____ ppm.

A. 200
B. 280
C. 350
D. 390
E. 420


Answer: B

Environmental & Atmospheric Sciences

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The ________ is characterized by subsidence and divergence near the 30? latitude, north and south, and consists of several semipermanent, anticyclonic centers.

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences

The mid-oceanic ridge is 80,000 km-long mountain range on the ocean floor. Where does this mountain range lie in terms of plate tectonic features?

What will be an ideal response?

Environmental & Atmospheric Sciences

In geography, we can describe the location of a place by ________, which is the physical character of a place

A) location B) situation C) site D) direction E) none of the answer choices are correct.

Environmental & Atmospheric Sciences

Frontal lifting:

A) is not related to temperature differences between air masses. B) leads to increased pressure on the warm front. C) can act in a way that is analogous to orographic lifting. D) is most pronounced when a cold front meets a cold front.

Environmental & Atmospheric Sciences