Concentration of Atmospheric Gases in Sea Water Ch. 7 pp. 178-182
Compose a line graph for the data given above. Plot data for carbon dioxide and dissolved oxygen on the same
graph.
DATA:
Carbon dioxide Concentration
Depth (m)
Concentration(ppm)
0
90.0
200
91.0
400
95.0
600
100.0
800
101.5
1000
102.0
1200
103.0
1400
104.0
1600
104.0
1800
104.0
2000
104.0
Dissolved Oxygen Concentration
Depth (m)
Concentration(ppm)
0
110
200
100
400
95
600
94
800
94
1000
95
1200
96
1400
96
1600
96
1800
96
2000
96
0
200
400
Depth (m)
600
800
1000
1200
1400
1600
1800
Concentration (ppm)
110.0
109.0
108.0
107.0
106.0
105.0
104.0
103.0
102.0
101.0
100.0
99.0
98.0
97.0
96.0
95.0
94.0
93.0
92.0
91.0
90.0
2000
OBSERVATIONS:
1. Which two atmospheric gases are being compared in this graph?
2. At which depth is the amount of dissolved oxygen the greatest? ______________
3. At which depth is the amount of dissolved oxygen the least? _______________
4. At which depth is the amount of dissolved carbon dioxide greatest? ___________
5. At which depth is the amount of dissolved carbon dioxide least? ______________
6. What are the two major ways in which O2 enters the ocean?
7. Give two reasons why O2 is found only at the ocean’s surface.
8. What are the two major ways in which CO2 enters the ocean?
9. Why is the amount of carbon dioxide least at the surface?
10. True or False – Most solids and gases are soluble in water.
11. Which major atmospheric gas is both inert and abundant?
12. The amount of any gas that can be held in solution without causing the solution to gain
or lose gas is the ____________________.
For each of the following factors, tell whether the saturation value increases or decreases.
Increase or Decrease
Factor
in Saturation Value?
13. Decreasing Temperature
14. Increasing Pressure
15. Decreasing Salinity