WorksheetsOcean Chemistry and Structure
Total questions: 25
Worksheet time: 50mins
What is typical salinity of open ocean waters?
15 ppm
25 ppm
35 ppm
45 ppm
The two primary sources for salt being added to the ocean.
Chemical Weathering and volcanic eruptions
Earthquakes and landslides
Fish overpopulation and precipitation
Melting sea ice and condensation
Coral reefs are endangered by
climate change
overfishing
pollution
all of the above
How much of the world's oxygen is produced by algae?
50 - 60 %
70 - 80 %
60 - 70 %
90 - 100 %
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
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.
How is density affected by temperature and salinity?
as temperature decreases, salinity will increase
as temperature increases, salinity will increase
as temperature decreases, salinity will decrease
as temperature increases, salinity will decrease
