Most organisms in the biosphere exchange the gases oxygen and carbon dioxide with the atmosphere. Which of the following describe an exchange of matter between the atmosphere and the geosphere?
A. a volcanic eruption releasing carbon dioxide into the atmosphere
B. carbon dioxide dissolving from the atmosphere into ocean water
C. the remains of living things settling on the floor of the ocean, and then becoming rock
D. water vapor condensing in the air to form clouds

Two nursing assistants are in line to wash their hands at a hospital after leaving a patient in an isolation room. the first na washes her hands and then uses her hands to turn off the faucet before drying them with a paper towel. the second na turns on the water with her hands and then proceeds to wash and dry her hands with a paper towel. which statement best describes errors demonstrated by the nursing assistants? the first na did not ensure a clean hand-washing environment, and the second na did not properly turn off the water the first na did not properly turn off the water, and the second na did not ensure a clean hand-washing environment. the first na did not properly turn off the water, and the second na did not properly use paper towels. the first na did not properly use paper towels, and the second na did not ensure a clean hand-washing environment.