| Some multiple choice Geology questions.?
It has been discovered that a population of immortal killer gophers are growing at constant arithmetic rate. First month = 2 gophers. Second month = 8 gophers. How long before 30 million killer gophers are there?
a) one year
b) 10^2 years
c) 10^3 years
d) 10^4 years
e) 10^5 years
Determination of the age of the earth using lead isotopes requires knowing all of the following except:
a) the Pb207/206 ratio at the time of origin of the earth
b) the half life of Pb206 and Pb207.
c) ages of meteorites
d) modern Pb207/Pb206 ratio
Creation of Isthmus of Panama may have contributed to initiation of Laurentide Ice Sheet 2-3 million years ago by
a) shunning warm water northward that provided a source for snow in North Atlantic.
b) blocking warm currents in Atlantic, which cooled northern latitudes.
c) blocking warm currents in Pacific, which cooled northern latitudes.
d) blocking warm currents in Arctic Ocean, which cooled northern latitudes.
e) allowing circum-Antarctic current to develop. | 
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