This density zone of the ocean has little change in density with increasing depth, and is 80% of all ocean water?

Explain how a dead zone forms (up to 5 points based on quality of answer)

What acronym stands for the six elements that make up 95% of the body weight of living things?

This is the amount of heat energy required to produce a unit change in the temperature of a material?

This is the greatest source of oil in the marine environment?

Which of these is most dense?

At what temperature does water freeze?

Organisms that can tolerate a wide variety of salinities?

This is the measure of the average kinetic energy of atoms?

This type of boundary happens when two plates slide past each other?