Most meteorites are
A) carbon-rich and primitive.
B) rocky and primitive.
C) carbon-rich and processed.
D) rocky and processed.
E) iron-rich and processed.
Question 2
What happens to the surface temperature and luminosity when gravity first assembles a protostar from a collapsing cloud?
A) Its surface temperature and luminosity increase.
B) Its surface temperature remains the same and its luminosity decreases.
C) Its surface temperature and luminosity decrease.
D) Its surface temperature decreases and its luminosity increases.
E) Its surface temperature and luminosity remain the same.
The carbon cycle. Numbers are storage as 1015 g or fluxes as 1015 g per year (data from Schlesinger
A passenger train crosses Stony Creek Bridge in the Rocky Mountains in 1878. Railroads were importan
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Carbon Orbitals
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Carbon dioxide: The anthropogenic greenhouse gas of primary concern