Which of these is a physical property? A) ability to burn a piece of paper
B) pure sodium reacts violently with water
C) the boiling point of water is 100 degrees
D) helium does not tend to react with anything

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?