1. in which region of the oceans dose good mixing prevent layering?
a. tropical region
b. polar region
c. areas near continents
d. the open ocean
2. wind , friction, and the coriolis effect combine to move water in which direction?
a. in no particular direction
b. parallel to the wind
c. against the wind
d. perpendicular to the wind \
3. two divers are diving in clean ocean water at a depth of 175 m. one diver shows a white maker bored to the other with writing on it what color will the marker board appear to be?
a. violet
b. red
c. blue
d. orange
4. which of the following is the most important factor in diving global
thermohaline (conveyor belt) circulation?
a. changes in gravity
b. changes in ph
c. changes in density
d. changes in wind direction and velocity
5. which ion is most abundant in seawater?
a. sodium
b. magnesium
c. sulfate
d. chloride
6. which of the following factors interact to create currents that are less than 50 m deep?
a. wind, temperature and salinity
b. temperature, gravity and the coriolis effects
c. density temperature and salinity
d. wind, friction and the coriolis effect
7. a polyclinic is a boundary between changing regions of which of the following properties
a. sounds velocity
b. salinity
c. density
d. temperature
8. where would you find the coldest saltiest water in the oceans?
a. open oceans zone
b. surface-mixed zone
c. transition zone
d. deep zone
9. in which location is it most likely that salinity of the seawater will be the highest
a. in tropical regions
b. along the coast where rivers enter into the ocean
c. at the surface of the open ocean
d. in polar regions