Which of the following accurately describes 18O/16O ratios of the oceans?
A) During the winter, 16O is high in the ocean; during warmer periods the isotope ratio is lower.
B) The 18O/16O ratio in the ocean is low during the winter because temperatures are too low for 16O to evaporate.
C) The ratio of oceanic 18O/16O in the late summer is high, because the most of the 16O has evaporated by then.
D) Because 18O evaporates more readily than 16O, the oceans have a higher relative abundance of 16O during the summer.
A
You might also like to view...
One key to reducing sickness and immature death from infectious disease is to
A. develop enhanced DDT. B. isolate AIDS patients. C. improve drinking water quality. D. promote the use of teratogens. E. increase antibiotic use.
How big is 1 nm?
A) 1 x 10^-12 m B) 1 x 10^-9 m C) 1 x 10^-6 m D) 1 x 10^-3 m
The diameter of deep-water wave orbits decrease with depth.
Answer the following statement true (T) or false (F)
The agent of transport that produces talus is
A. wind. B. gravity. C. glacier. D. running water.