Average atmospheric CO2 concentrations have ____ over the past 100 years

A) slightly decreased
B) remained constant
C) significantly decreased
D) increased


D

Environmental & Atmospheric Sciences

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The greatest percentage of the earth's atmosphere is composed of

A. nitrogen. B. carbon dioxide. C. argon. D. methane. E. oxygen.

Environmental & Atmospheric Sciences

In most arid climates, the surplus in the water balance is much less than the deficit.

Indicate whether the statement is true or false.

Environmental & Atmospheric Sciences

Which one of the following rocks is NOT a clastic sedimentary rock?

a) Shale b) Sandstone c) Conglomerate d) Chert e) Breccia

Environmental & Atmospheric Sciences

How many minutes are in a 365 day year? [Assume exactly 24 hours in a day]

A) 8.760 x 10^3 B) 2.190 x 10^4 C) 5.256 x 10^5 D) 3.154 x 10^7

Environmental & Atmospheric Sciences