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.
On average, the ratio of carbon to nitrogen is much higher in terrestrial plants than in other major
Achilemys cassouleti, the most primitive testudine
Stony Meteorites
The ethanol molecule showing two carbon atoms, six hydrogen atoms, and one oxygen atom.
Life in sulfur-rich, anoxic sediments