Multiple Choice
How is it possible for scientists to know how much carbon dioxide is assimilated by the oceans?
A) Scientists actually do not know how much carbon dioxide is assimilated by the oceans. There are only crude estimates based off of models.
B) Scientists use ice cores to estimate how much carbon dioxide is assimilated by the oceans.
C) Scientists track this by using carbon in decayed and fossilized organisms from the deep sea.
D) Scientists can estimate how much carbon dioxide is assimilated by oceans with moderate precision because radioactive carbon dioxide from nuclear bombs can be tracked.
Correct Answer:

Verified
Correct Answer:
Verified
Q23: In recent years (1993-2013)the global rate of
Q24: Methane produced in the late 20th and
Q25: As atmospheric carbon dioxide levels have increased,the
Q26: One outcome of increased atmospheric carbon dioxide
Q27: What action by humans has most accelerated
Q29: The sulfur cycle is important for many
Q30: While some carbon accumulates in the atmosphere
Q31: Which factors most influence the sinks of
Q32: Which of the following is a reason
Q33: Acid rain that results from sulfur pollution