Study 3
The annual marine deposition of Cl− and SO 4 2− ions over the 12-month period was calculated in
kg/m^3 at the test site, and also at two sites in the Arctic Ocean, located 2,000 and 4,000 miles north,
respectively (see Figure 4).
Figure 4
7. According to Figure 1, during the year over which data were collected, the movement of water was greatest in February and least in
November. According to Figures 2 and 3 , the marine deposition of which ion was also greatest in February and least in November?
A. Cl−
B. Mg2+
C. Na+
D. SO 4 2−
8. Based on the results from Study 1, the mean monthly marine deposition for Cl− over the year of the study was:
F. less than 900 kg/m^3.
G. between 900 kg/m^3 and 1,000 kg/m^3.
H. between 1,000 kg/m^3 and 1,200 kg/m^3.
J. over 1,200 kg/m^3.
9. A student states, “The marine deposition of Na+ is highest in the winter and lowest in the summer, since the winter features greater
activity of volcanoes and hydrothermal vents.” Is this statement supported by the results of Study 2 ?
