Partial tides _______. a. represent various components of local tides that are resolved mathematically
b. are predicted individually
c. are added together to predict the height and timing of astronomical tides
d. All of the above are correct.
e. Only a and c are correct.
31. Internal waves form _______.
a. at the interface between layers of water where there is a density gradient
b. at the interface between the ocean surface and atmosphere where there is a density gradient
c. at the ocean’s main pycnocline and the base of the mixed layer
d. in the ocean but not in lakes
e. Both a and c are correct.