[ 383 ] Physical Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Oxygen (mg/L) What conclusion can be drawn from the chart and caption shown here? Solubility of Oxygen with Temperature 15 14 13 12 11 10 9 8 7 0 5 10 15 20 25 30 35 Temperature (°C) Fish require fve to six parts per million (ppm) of dissolved oxygen and cannot live at levels below two ppm. 1 mg/L = approximately 1 ppm A. Warmer water holds less oxygen. B. Fish cannot survive in water at 25°C. C. As temperature increases, oxygen dissolves more quickly. D. By doubling water temperature, the amount of dissolved oxygen is decreased by half.