1) What is ocean water composed of? a) Only water b) Water and dissolved solids c) Gases, water, and dissolved solids d) Gases and water 2) Why are marine organisms dependent on dissolved gases? a) For reproduction b) For movement c) For survival d) For excretion 3) What does salinity measure? a) The amount of dissolved oxygen in water b) The amount of all salts dissolved in water c) The temperature of the water d) The depth of the water 4) Which of the following factors does NOT affect the salinity of ocean water? a) Rates of evaporation b) The depth of the water c) Melting icebergs d) Wind speed 5) How can the depth of the water influence salinity? a) Deeper water generally has higher salinity b) Shallower water generally has higher salinity c) Depth has no influence on salinity d) Both A and B depending on location 6) What effect does runoff from nearby land have on ocean salinity? a) It increases salinity b) It decreases salinity c) It has no effect on salinity d) It only affects salinity in deep ocean regions 7) Which of the following would likely increase ocean salinity? a) Increased rainfall b) Increased runoff from rivers c) High rates of evaporation d) Melting glaciers 8) What is a common consequence of melting icebergs on ocean salinity? a) Increase in salinity b) Decrease in salinity c) No change in salinity d) Increase in water temperature 9) Which statement is true about the salinity of ocean water? a) It is the same everywhere in the ocean. b) It can vary depending on environmental factors. c) It only varies near the equator. d) It is higher near the poles. 10) What role do dissolved gases play in the ocean? a) They contribute to the ocean's color. b) They are necessary for marine life survival. c) They are pollutants. d) They increase the salinity of the water.
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Composition of the Ocean
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