13 7. Explain why shallow ocean water appears to be blue in color. When sunlight penetrates the ocean, the ocean water reflects the wavelengths of blue light and absorbs all other colors.
14 8. Why does the surface temperature of ocean water in middle latitudes vary during the year? The amount of incoming solar radiation varies greatly from season to season in these latitudes.
15 9. Why would surface water in the North Sea be more likely to contain a higher percentage of dissolved gases than the surface water in the Caribbean Sea?Surface waters in the North Sea are colder and colder water can hold more dissolved gases than warmer water.
16 10. If global temperatures increase, how would this change affect the ability of oceans to absorb CO2?Warmer water cannot hold as much dissolved gas as colder water so more CO2 would accumulate in the atmosphere.
17 11. If an area of the ocean has a large decrease in phytoplankton, how would this change affect other organisms? Explain your answer.Phytoplankton are at the bottom of the food chain so a decrease in the amount of phytoplankton would have a negative impact on all ocean life. There could be a decrease in the number of ocean organisms.
18 12. Use the following terms to create a concept map: ocean water, salinity, temperature, density, dissolved solids, and dissolved gases.