People once believed that the world was flat. what changed their minds?
a) the invention of the globe
b) queen mary decreed the world was round
c) continued travel to the western hemisphere
d) testing new hypotheses that generated new data

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

b) the inside picture would look at a very high temperature in a very low ph