WorksheetsAquatic Ecosystems and Ocean Acidification
Total questions: 11
Worksheet time: 12mins
In aquatic ecosystems, phytoplankton and other photosynthetic organisms appear in the upper layers of the water,but not deeper layers. Which statement explains this distribution?
The deeper layers are too cold for photosynthesis to occur.
The deeper layers have too little oxygen for photosynthetic organisms to survive.
The deeper layers have too much carbon dioxide for photosynthetic organisms to survive.
The deeper layers do not receive sunlight which is necessary for photosynthesis to occur.
A team of deep-sea divers and biologists is exploring the open ocean. As team members dive downward from the surface, they observe significant changes to the ocean community at a depth of about 200 meters. What is the main cause of the changes at this depth?
loss of brightness of the water
increasing salinity of the water
increasing temperature of the water
decreased oxygen concentration of the water
Carrie is conducting an experiment on a solution. The solution’s initial pH is 3.2. Then, as Carrie gradually adds Compound X into the solution, the pH increases to 9.8. Which is the most likely identity of Compound X?
a strong acid, such as hydrochloric acid (HCL)
a strong base, such as sodium hydroxide (NaOH)
a salt, such as sodium chloride (NaCl)
a solvent, such as water (H20)
Jill made the table below during her research on aquatic zones and living organisms.
Organisms in the intertidal zone must be able to withstand very cold water.
There are no producers in the benthic zone that rely on photosynthesis.
Organisms in the benthic zone must be able to tolerate large amounts of oxygen.
The warm water and abundant sunlight in the neritic zone limits the plankton population.
What happens to 1/4 of the greenhouse gases in the atmosphere?
It is released into space.
It gets absorbed by the ocean.
What do some marine creatures do with the carbonate ion?
use it as a food source
use it as a defense mechanism
use it to build shells and exoskeletons
use it to cool body temperatures
