Question

Just need answers checked PLEASE!

Answer 1

1. What is the salinity of seawater?
1.5 percent
3.5 percent***
5.5 percent
10 percent

2. What is the most abundant salt in the sea?
calcium chloride
magnesium chloride
potassium chloride
sodium chloride***

3. Most ocean water is located in which zone?
mixed zone
transition zone
surface zone
deep zone***

4. Which of the following properties most determines water’s vertical position in the ocean?
organic content
density***
velocity
oxygen content

5. Which of the following is NOT a category of marine organisms?
plankton
nekton
aphotic***
benthos

6. Which of the following is a type of plankton?
shark
algae***
squid
crab

7. Which of the following is a type of nekton?
shark***
zooplankton
bacteria
sea star

8. How do animals survive in the deeper parts of the seafloor?
They feed on each other.****
They feed at the surface.
They photosynthesize.
none of the above