Imagine a researcher aboard an oceanographic vessel collects samples from the water column, extending from the surface to 3000 meters depth. sample analyses shows that the water is isopycnal. which of the following statements correctly define what this means and why?
a) the samples must have been taken from a location in the ocean at high latitude
b) the samples analyses show there is no phycnocline present
c) the temperature of the water coulmn is constant throughout its depth.

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade

Explain the reason for having an equator and a prime meridian. how do these two lines us to navigate our world? describe your opinion in at least two to three sentences.

The hypothetical island country of gilder lies in the mediterranean sea off the coast of france. demographers have studied gilder for the past 50 years. at the beginning of the study, gilder had a population of 20 million. the demographers have measured birth and death numbers, as well as immigration and emigration numbers, as shown in the data table. from the data, calculate the population of gilder for each 10-year period by filling in the population (no) and population (nt) columns in the data table. use this formula to do your calculations: population size: nt = no + (b + i) – (d + e)initial population = 20,000,000