Chemical Oceanography

The ocean is filled with saltwater. All of this water has the same salinity.

• True

• False

What creates a halocline?

• The difference in temperature between two areas of water.

• The difference in pH between two areas of water.

• The difference in salinity between two areas of water.

When corals are stressed they expel (spit out) algae. What is this phenomenon called?

• coral bleeching

• coral death

• coral stress

Corals have a _______ relationship with microscopic algae (zooxanthellae).

• Commensalistic

• Parasitic

• Mutualistic

Corals tend to get stressed when pH ______ and temperature ______.

• increases / decreases

• decreases / increases

• increases / increases

• decrease / decrease

When layering salt water, which of the following salinities would be found at the bottom?

• 24 ppt

• 5 ppt

• 17 ppt

• 32 ppt

What causes Eutrophication?

• decrease in nutrients in the water

• increase in nutrients in the water

• increase in the amount of fish in the water

• decrease in the amount of fish in the water

Eutrophication causes...

• haloclines

• coral bleaching

• dead zones

• ocean acidification

Ocean acidification is caused by...

• too much carbon dioxide entering the ocean

• Not enough carbon dioxide entering the ocean

• corals spitting out their algae

When the ocean is getting more acidic, is the pH increasing or decreasing?

• Increasing

• Decreasing