The measurement of an objects mass, volume, and density is

a physical change

b physical property

c chemical change

d chemical property

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

the answer is 1. photosynthesis. glad to

answer: a) a compound microscope has a greater magnification ability than a simple microscope.

explanation:

it is either c or d and i know for sure it is not a or b