History of the Ocean
Millions of years ago the land on Earth existed as this super-continent
What is Pangea?
This number, the pH of seawater, makes it alkaline
What is 8?
This is one of the effects of global warming on the ocean
What is rising temperatures melt the ice caps and cause the water to rise
This is the column of water where salinity changes considerably
What is the halocline?
This knowledge of the oceans is key to navigation on the water
What are ocean currents?
This geological phenomenon can create tsunamis
What is plate tectonics?
This phenomenon can cause the seawater to look green
What is phytoplankton?
This is the column of water where the temperature shows a steep drop
What is the thermocline?
This is a major feature of the southern ocean
What is the antartic bottom?
This causes ice to float
What is the ice expands, lowering its density?
This is the column of water where density increases markedly
What is the pycnocline?
Carbon dioxide dissolves in seawater and becomes these ions
What are bicarbonate ions?
This phenomenon helps aerobic organisms live underwater.
What is downwelling?