An oceanographer is examing two samples of seawater that both have the exact same salinity level. however, their densities are different. sample a has a lower density than sample b , what could be the reason for samples a's lower density

Considering the answers;
a) Sample A is warmer than sample B
b) Sample A is colder than Sample B
c) There is a smaller amount of sample A than sample B in the container
d) There is a larger amount of sample A than sample B in the container
The correct answer would be A. sample A is warmer than sample B.
Ocean water or sea water gets more dense as temperature goes down. Therefore; the colder the water, the more dense it is. Increasing salinity also increases the density of sea water. Less dense water floats on top of more dense water. In this case sample A is less denser than sample B, which means it is warmer than sample B. 

  Alexander III of Macedon (Alexander the Great), apart from being a great military tactician and in a way promoted some initial version of globalization, he was also an explorer.

  With his conquering, Alexander and the Macedonian soldiers managed to reach parts of the world that were either unknown, or were things of legends and myths in Europe.

  Multiple people that were historians, philosophers, or were interested in any science were writing down pretty much everything, and they also were trying to make maps of the newly discovered places, which gave the people in Macedon, and all the others from the region that the world is much bigger than they thought previously.